diff --git a/src/models/inventoryModels/inventoryModel.ts b/src/models/inventoryModels/inventoryModel.ts
index 28292ba4..d85f6d11 100644
--- a/src/models/inventoryModels/inventoryModel.ts
+++ b/src/models/inventoryModels/inventoryModel.ts
@@ -605,6 +605,8 @@ const inventorySchema = new Schema<IInventoryDatabase, InventoryDocumentProps>(
         PremiumCreditsFree: Number,
         //Endo
         FusionPoints: Number,
+        //Regal Aya
+        PrimeTokens: Number,
 
         //Slots
         SuitBin: slotsBinSchema,
diff --git a/src/services/purchaseService.ts b/src/services/purchaseService.ts
index ea4673f0..fa1ff3d9 100644
--- a/src/services/purchaseService.ts
+++ b/src/services/purchaseService.ts
@@ -12,6 +12,7 @@ import {
 import { IMiscItem } from "@/src/types/inventoryTypes/inventoryTypes";
 import { IPurchaseRequest, SlotPurchase, IInventoryChanges } from "@/src/types/purchaseTypes";
 import { logger } from "@/src/utils/logger";
+import worldState from "@/static/fixed_responses/worldState.json";
 import { ExportBundles, ExportGear, ExportVendors, TRarity } from "warframe-public-export-plus";
 
 export const getStoreItemCategory = (storeItem: string) => {
@@ -64,7 +65,7 @@ export const handlePurchase = async (purchaseRequest: IPurchaseRequest, accountI
                     for (const item of offer.itemPrices) {
                         const invItem: IMiscItem = {
                             ItemType: item.ItemType,
-                            ItemCount: item.ItemCount * -1
+                            ItemCount: item.ItemCount * purchaseRequest.PurchaseParams.Quantity * -1
                         };
 
                         addMiscItems(inventory, [invItem]);
@@ -74,7 +75,7 @@ export const handlePurchase = async (purchaseRequest: IPurchaseRequest, accountI
                             x => x.ItemType == item.ItemType
                         );
                         if (change) {
-                            change.ItemCount -= item.ItemCount;
+                            change.ItemCount += invItem.ItemCount;
                         } else {
                             (purchaseResponse.InventoryChanges.MiscItems as IMiscItem[]).push(invItem);
                         }
@@ -84,6 +85,36 @@ export const handlePurchase = async (purchaseRequest: IPurchaseRequest, accountI
                 }
             }
             break;
+        case 18: {
+            if (purchaseRequest.PurchaseParams.SourceId! != worldState.PrimeVaultTraders[0]._id.$oid) {
+                throw new Error("invalid request source");
+            }
+            const offer =
+                worldState.PrimeVaultTraders[0].Manifest.find(
+                    x => x.ItemType == purchaseRequest.PurchaseParams.StoreItem
+                ) ??
+                worldState.PrimeVaultTraders[0].EvergreenManifest.find(
+                    x => x.ItemType == purchaseRequest.PurchaseParams.StoreItem
+                );
+            if (offer) {
+                const inventory = await getInventory(accountId);
+                if (offer.RegularPrice) {
+                    const invItem: IMiscItem = {
+                        ItemType: "/Lotus/Types/Items/MiscItems/SchismKey",
+                        ItemCount: offer.RegularPrice * purchaseRequest.PurchaseParams.Quantity * -1
+                    };
+
+                    addMiscItems(inventory, [invItem]);
+
+                    purchaseResponse.InventoryChanges.MiscItems ??= [];
+                    (purchaseResponse.InventoryChanges.MiscItems as IMiscItem[]).push(invItem);
+                } else {
+                    inventory.PrimeTokens -= offer.PrimePrice! * purchaseRequest.PurchaseParams.Quantity;
+                }
+                await inventory.save();
+            }
+            break;
+        }
     }
 
     return purchaseResponse;
diff --git a/src/types/inventoryTypes/inventoryTypes.ts b/src/types/inventoryTypes/inventoryTypes.ts
index fd207bc9..bb93d8e0 100644
--- a/src/types/inventoryTypes/inventoryTypes.ts
+++ b/src/types/inventoryTypes/inventoryTypes.ts
@@ -125,6 +125,7 @@ export interface IInventoryResponse {
     PremiumCredits: number;
     PremiumCreditsFree: number;
     FusionPoints: number;
+    PrimeTokens: number;
     SuitBin: ISlots;
     WeaponBin: ISlots;
     SentinelBin: ISlots;
diff --git a/src/types/purchaseTypes.ts b/src/types/purchaseTypes.ts
index 9a7edd1e..c09dff33 100644
--- a/src/types/purchaseTypes.ts
+++ b/src/types/purchaseTypes.ts
@@ -5,7 +5,7 @@ export interface IPurchaseRequest {
 
 export interface IPurchaseParams {
     Source: number;
-    SourceId?: string; // for Source 7
+    SourceId?: string; // for Source 7 & 18
     StoreItem: string;
     StorePage: string;
     SearchTerm: string;