diff --git a/src/ship/items/bank.rs b/src/ship/items/bank.rs
index 5abef95..5494102 100644
--- a/src/ship/items/bank.rs
+++ b/src/ship/items/bank.rs
@@ -64,10 +64,10 @@ pub struct BankItem {
 }
 
 impl BankItem {
-    pub async fn with_entity_id<F, Fut, T>(&self, mut param: T, mut func: F) -> Result<T, ItemStateError>
+    pub async fn with_entity_id<F, Fut, T>(&self, mut param: T, mut func: F) -> Result<T, anyhow::Error>
     where
         F: FnMut(T, ItemEntityId) -> Fut,
-        Fut: Future<Output=Result<T, ItemStateError>>,
+        Fut: Future<Output=Result<T, anyhow::Error>>,
     {
         match &self.item {
             BankItemDetail::Individual(individual_item) => {
@@ -125,27 +125,27 @@ impl BankState {
         self.item_id_counter = base_item_id + self.bank.0.len() as u32;
     }
 
-    pub fn add_meseta(&mut self, amount: u32) -> Result<(), ItemStateError> {
+    pub fn add_meseta(&mut self, amount: u32) -> Result<(), anyhow::Error> {
         if self.meseta.0 + amount > 999999 {
-            return Err(ItemStateError::FullOfMeseta)
+            return Err(ItemStateError::FullOfMeseta.into())
         }
         self.meseta.0 += amount;
         Ok(())
     }
 
-    pub fn remove_meseta(&mut self, amount: u32) -> Result<(), ItemStateError> {
+    pub fn remove_meseta(&mut self, amount: u32) -> Result<(), anyhow::Error> {
         if amount > self.meseta.0 {
-            return Err(ItemStateError::InvalidMesetaRemoval(amount))
+            return Err(ItemStateError::InvalidMesetaRemoval(amount).into())
         }
         self.meseta.0 -= amount;
         Ok(())
     }
 
-    pub fn add_inventory_item(&mut self, item: InventoryItem) -> Result<AddItemResult, BankError> {
+    pub fn add_inventory_item(&mut self, item: InventoryItem) -> Result<AddItemResult, anyhow::Error> {
         match item.item {
             InventoryItemDetail::Individual(iitem) => {
                 if self.bank.0.len() >= 30 {
-                    Err(BankError::BankFull)
+                    Err(BankError::BankFull.into())
                 }
                 else {
                     self.bank.0.push(BankItem {
@@ -166,7 +166,7 @@ impl BankState {
                 match existing_stack {
                     Some(existing_stack) => {
                         if existing_stack.entity_ids.len() + sitem.entity_ids.len() > sitem.tool.max_stack() {
-                            Err(BankError::StackFull)
+                            Err(BankError::StackFull.into())
                         }
                         else {
                             existing_stack.entity_ids.append(&mut sitem.entity_ids.clone());
@@ -175,7 +175,7 @@ impl BankState {
                     },
                     None => {
                         if self.bank.0.len() >= 30 {
-                            Err(BankError::BankFull)
+                            Err(BankError::BankFull.into())
                         }
                         else {
                             self.bank.0.push(BankItem {
diff --git a/src/ship/items/floor.rs b/src/ship/items/floor.rs
index 2aab742..c71b7fd 100644
--- a/src/ship/items/floor.rs
+++ b/src/ship/items/floor.rs
@@ -33,7 +33,7 @@ pub struct FloorItem {
 }
 
 impl FloorItem {
-    pub async fn with_entity_id<F, Fut, T>(&self, mut param: T, mut func: F) -> Result<T, ItemStateError>
+    pub async fn with_entity_id<F, Fut, T>(&self, mut param: T, mut func: F) -> Result<T, anyhow::Error>
     where
         F: FnMut(T, ItemEntityId) -> Fut,
         Fut: Future<Output=Result<T, ItemStateError>>,
@@ -53,10 +53,10 @@ impl FloorItem {
         Ok(param)
     }
 
-    pub async fn with_mag<F, Fut, T>(&self, mut param: T, mut func: F) -> Result<T, ItemStateError>
+    pub async fn with_mag<F, Fut, T>(&self, mut param: T, mut func: F) -> Result<T, anyhow::Error>
     where
         F: FnMut(T, ItemEntityId, Mag) -> Fut,
-        Fut: Future<Output=Result<T, ItemStateError>>,
+        Fut: Future<Output=Result<T, anyhow::Error>>,
     {
         if let FloorItemDetail::Individual(individual_item) = &self.item {
             if let ItemDetail::Mag(mag) = &individual_item.item {
diff --git a/src/ship/items/inventory.rs b/src/ship/items/inventory.rs
index e10a808..bfd709b 100644
--- a/src/ship/items/inventory.rs
+++ b/src/ship/items/inventory.rs
@@ -60,7 +60,7 @@ impl InventoryItemDetail {
     }
 
     // TODO: this should probably go somewhere a bit more fundamental like ItemDetail
-    pub fn sell_price(&self) -> Result<u32, ItemStateError> {
+    pub fn sell_price(&self) -> Result<u32, anyhow::Error> {
         match self {
             InventoryItemDetail::Individual(individual_item) => {
                 match &individual_item.item {
@@ -102,7 +102,7 @@ impl InventoryItemDetail {
                         Ok((ToolShopItem::from(d).price() / 8) as u32)
                     },
                     ItemDetail::Mag(_m) => {
-                        Err(ItemStateError::ItemNotSellable)
+                        Err(ItemStateError::ItemNotSellable.into())
                     },
                     ItemDetail::ESWeapon(_e) => {
                         Ok(10u32)
@@ -126,10 +126,10 @@ pub struct InventoryItem {
 }
 
 impl InventoryItem {
-    pub async fn with_entity_id<F, Fut, T>(&self, mut param: T, mut func: F) -> Result<T, ItemStateError>
+    pub async fn with_entity_id<F, Fut, T>(&self, mut param: T, mut func: F) -> Result<T, anyhow::Error>
     where
         F: FnMut(T, ItemEntityId) -> Fut,
-        Fut: Future<Output=Result<T, ItemStateError>>,
+        Fut: Future<Output=Result<T, anyhow::Error>>,
     {
         match &self.item {
             InventoryItemDetail::Individual(individual_item) => {
@@ -145,10 +145,10 @@ impl InventoryItem {
         Ok(param)
     }
 
-    pub async fn with_mag<F, Fut, T>(&self, mut param: T, mut func: F) -> Result<T, ItemStateError>
+    pub async fn with_mag<F, Fut, T>(&self, mut param: T, mut func: F) -> Result<T, anyhow::Error>
     where
         F: FnMut(T, ItemEntityId, Mag) -> Fut,
-        Fut: Future<Output=Result<T, ItemStateError>>,
+        Fut: Future<Output=Result<T, anyhow::Error>>,
     {
         if let InventoryItemDetail::Individual(individual_item) = &self.item {
             if let ItemDetail::Mag(mag) = &individual_item.item {
@@ -205,11 +205,11 @@ impl InventoryState {
         self.inventory.0.len()
     }
 
-    pub fn add_floor_item(&mut self, item: FloorItem) -> Result<AddItemResult, InventoryError> {
+    pub fn add_floor_item(&mut self, item: FloorItem) -> Result<AddItemResult, anyhow::Error> {
         match item.item {
             FloorItemDetail::Individual(iitem) => {
                 if self.inventory.0.len() >= 30 {
-                    Err(InventoryError::InventoryFull)
+                    Err(InventoryError::InventoryFull.into())
                 }
                 else {
                     self.inventory.0.push(InventoryItem {
@@ -229,7 +229,7 @@ impl InventoryState {
                 match existing_stack {
                     Some(existing_stack) => {
                         if existing_stack.entity_ids.len() + sitem.entity_ids.len() > sitem.tool.max_stack() {
-                            Err(InventoryError::StackFull)
+                            Err(InventoryError::StackFull.into())
                         }
                         else {
                             existing_stack.entity_ids.append(&mut sitem.entity_ids.clone());
@@ -238,7 +238,7 @@ impl InventoryState {
                     },
                     None => {
                         if self.inventory.0.len() >= 30 {
-                            Err(InventoryError::InventoryFull)
+                            Err(InventoryError::InventoryFull.into())
                         }
                         else {
                             self.inventory.0.push(InventoryItem {
@@ -253,7 +253,7 @@ impl InventoryState {
             },
             FloorItemDetail::Meseta(meseta) => {
                 if self.meseta == Meseta(999999) {
-                    Err(InventoryError::MesetaFull)
+                    Err(InventoryError::MesetaFull.into())
                 }
                 else {
                     self.meseta.0 = std::cmp::min(self.meseta.0 + meseta.0, 999999);
@@ -263,11 +263,11 @@ impl InventoryState {
         }
     }
 
-    pub fn add_item(&mut self, item: InventoryItem) -> Result<(AddItemResult, InventoryItem), InventoryError> {
+    pub fn add_item(&mut self, item: InventoryItem) -> Result<(AddItemResult, InventoryItem), anyhow::Error> {
         match &item.item {
             InventoryItemDetail::Individual(_) => {
                 if self.inventory.0.len() >= 30 {
-                    Err(InventoryError::InventoryFull)
+                    Err(InventoryError::InventoryFull.into())
                 }
                 else {
                     self.inventory.0.push(item);
@@ -290,7 +290,7 @@ impl InventoryState {
                 match existing_stack {
                     Some(existing_stack) => {
                         if existing_stack.entity_ids.len() + sitem.entity_ids.len() > sitem.tool.max_stack() {
-                            Err(InventoryError::StackFull)
+                            Err(InventoryError::StackFull.into())
                         }
                         else {
                             existing_stack.entity_ids.append(&mut sitem.entity_ids.clone());
@@ -307,7 +307,7 @@ impl InventoryState {
                     },
                     None => {
                         if self.inventory.0.len() >= 30 {
-                            Err(InventoryError::InventoryFull)
+                            Err(InventoryError::InventoryFull.into())
                         }
                         else {
                             self.inventory.0.push(item);
@@ -370,25 +370,25 @@ impl InventoryState {
             .find(|i| i.item_id == *item_id)
     }
 
-    pub fn add_meseta(&mut self, amount: u32) -> Result<(), ItemStateError> {
+    pub fn add_meseta(&mut self, amount: u32) -> Result<(), anyhow::Error> {
         if self.meseta.0 == 999999 {
-            return Err(ItemStateError::FullOfMeseta)
+            return Err(ItemStateError::FullOfMeseta.into())
         }
         self.meseta.0 = std::cmp::min(self.meseta.0 + amount, 999999);
         Ok(())
     }
 
-    pub fn add_meseta_no_overflow(&mut self, amount: u32) -> Result<(), ItemStateError> {
+    pub fn add_meseta_no_overflow(&mut self, amount: u32) -> Result<(), anyhow::Error> {
         if self.meseta.0 + amount > 999999 {
-            return Err(ItemStateError::FullOfMeseta)
+            return Err(ItemStateError::FullOfMeseta.into())
         }
         self.meseta.0 += amount;
         Ok(())
     }
 
-    pub fn remove_meseta(&mut self, amount: u32) -> Result<(), ItemStateError> {
+    pub fn remove_meseta(&mut self, amount: u32) -> Result<(), anyhow::Error> {
         if amount > self.meseta.0 {
-            return Err(ItemStateError::InvalidMesetaRemoval(amount))
+            return Err(ItemStateError::InvalidMesetaRemoval(amount).into())
         }
         self.meseta.0 -= amount;
         Ok(())
diff --git a/src/ship/items/state.rs b/src/ship/items/state.rs
index 44df7f9..1267b1b 100644
--- a/src/ship/items/state.rs
+++ b/src/ship/items/state.rs
@@ -22,6 +22,8 @@ pub enum ItemStateError {
     NoCharacter(CharacterEntityId),
     #[error("room {0} not found")]
     NoRoom(RoomId),
+    #[error("inventory item {0} not found")]
+    NoInventoryItem(ClientItemId),
     #[error("floor item {0} not found")]
     NoFloorItem(ClientItemId),
     #[error("expected {0} to be a tool")]