diff --git a/src/parsing.ts b/src/parsing.ts
index b89d9e00..096d775d 100644
--- a/src/parsing.ts
+++ b/src/parsing.ts
@@ -1,5 +1,5 @@
 /** A collection of parsing codecs */
-import { array, Codec, date, record, string, unknown } from 'purify-ts/Codec'
+import { array, Codec, date, exactly, oneOf, record, string, unknown } from 'purify-ts/Codec'
 import { Left, Right } from 'purify-ts/Either'
 
 export const ensureArray = <T>(tag: string, codec: Codec<T>): Codec<T[]> => {
@@ -101,3 +101,5 @@ export const nextToken = <T extends string>(action: T) =>
     encode: (x) => x,
     schema: () => ({ type: 'string' }),
   })
+
+export const oneOfEnum = (enm: object) => oneOf(Object.values(enm).map((x: string) => exactly(x)))
diff --git a/src/sections/products/codec.ts b/src/sections/products/codec.ts
index 1952f34e..5cf05e41 100644
--- a/src/sections/products/codec.ts
+++ b/src/sections/products/codec.ts
@@ -1,27 +1,64 @@
 import {
   boolean,
   Codec,
-  exactly,
   GetInterface,
   lazy,
   number,
-  oneOf,
   optional,
   record,
   string,
   unknown,
 } from 'purify-ts'
 
-import { ensureArray, mwsDate } from '../../parsing'
-import { CurrencyCodeEnum, FeeDetail as FeeDetailInterface, IdType, Status } from './type'
+import { ensureArray, mwsDate, oneOfEnum } from '../../parsing'
+import { FeeDetail as FeeDetailInterface } from './type'
 
 /**
  * Collection of codecs for the products api
  */
 
+enum ItemConditionEnum {
+  Any = 'Any',
+  New = 'New',
+  Used = 'Used',
+  Collectible = 'Collectible',
+  Refurbished = 'Refurbished',
+  Club = 'Club',
+}
+
+const ItemCondition = oneOfEnum(ItemConditionEnum)
+
+enum CurrencyCodeEnum {
+  USD = 'USD',
+  EUR = 'EUR',
+  GBP = 'GBP',
+  RMB = 'RMB',
+  INR = 'INR',
+  JPY = 'JPY',
+  CAD = 'CAD',
+  MXN = 'MXN',
+}
+
+const CurrencyCode = oneOfEnum(CurrencyCodeEnum)
+
+enum StatusEnum {
+  Success = 'Success',
+  ClientError = 'ClientError',
+  ServiceError = 'ServiceError',
+}
+
+const Status = oneOfEnum(StatusEnum)
+
+enum IdTypeEnum {
+  ASIN = 'ASIN',
+  SKU = 'SKU',
+}
+
+const IdType = oneOfEnum(IdTypeEnum)
+
 const MoneyType = Codec.interface({
   Amount: optional(number),
-  CurrencyCode: oneOf(Object.values(CurrencyCodeEnum).map((x) => exactly(x))),
+  CurrencyCode,
 })
 
 export const Points = Codec.interface({
@@ -43,7 +80,7 @@ const PriceToEstimateFees = Codec.interface({
 
 const FeesEstimateIdentifier = Codec.interface({
   MarketplaceId: string,
-  IdType: oneOf(Object.values(IdType).map((x) => exactly(x))),
+  IdType,
   IdValue: string,
   PriceToEstimateFees,
   SellerInputIdentifier: string,
@@ -73,7 +110,7 @@ const FeesEstimate = Codec.interface({
 const FeesEstimateResult = Codec.interface({
   FeesEstimateIdentifier,
   FeesEstimate: optional(FeesEstimate),
-  Status: oneOf(Object.values(Status).map((x) => exactly(x))),
+  Status,
   Error: optional(ErrorType),
 })
 
@@ -171,8 +208,34 @@ export const GetLowestOfferListingsForASINResponse = Codec.interface({
  * @todo - complete definitions
  */
 
+/**
+ * This has attributes instead of children, how do we handle that?
+ * http://docs.developer.amazonservices.com/en_CA/products/Products_Datatypes.html#OfferCount
+ */
+// const OfferCountType = number
+
+// const LowestPrice
+
+// const Summary = Codec.interface({
+//   TotalOfferCount: number,
+//   NumberOfOffers: OfferCountType,
+//   LowestPrices: optional(ensureArray('LowestPrice', LowestPrice)),
+//   BuyBoxPrices: optional(ensureArray('BuyBoxPrice', BuyBoxPrice)),
+//   ListPrice: optional(MoneyType),
+//   SuggestedLowerPricePlusShipping: optional(MoneyType),
+//   BuyBoxEligibleOffers: optional(OfferCountType),
+//   OffersAvailableTime: optional(mwsDate)
+// })
+
+const Identifier = Codec.interface({
+  MarketplaceId: string,
+  SellerSKU: string,
+  ItemCondition,
+  TimeOfOfferChange: optional(mwsDate),
+})
+
 const GetLowestPricedOffersForSKU = Codec.interface({
-  Identifier: unknown,
+  Identifier,
   Summary: unknown,
   Offers: unknown,
 })
diff --git a/src/sections/products/type.ts b/src/sections/products/type.ts
index 298aeaaa..9b779cfd 100644
--- a/src/sections/products/type.ts
+++ b/src/sections/products/type.ts
@@ -1,22 +1,8 @@
 /**
  * Collection of types for products API
  */
-export enum CurrencyCodeEnum {
-  USD = 'USD',
-  EUR = 'EUR',
-  GBP = 'GBP',
-  RMB = 'RMB',
-  INR = 'INR',
-  JPY = 'JPY',
-  CAD = 'CAD',
-  MXN = 'MXN',
-}
 
-export enum Status {
-  Success = 'Success',
-  ClientError = 'ClientError',
-  ServiceError = 'ServiceError',
-}
+export type ItemCondition = 'Any' | 'New' | 'Used' | 'Collectible' | 'Refurbished' | 'Club'
 
 export interface MoneyType {
   Amount: number | undefined
@@ -57,11 +43,6 @@ export interface GetMyFeesEstimateParameters {
   [key: string]: FeeEstimateRequest[]
 }
 
-export enum IdType {
-  ASIN = 'ASIN',
-  SKU = 'SKU',
-}
-
 export interface ListMatchingProductsRequestParameters {
   MarketplaceId: string
   Query: string
@@ -94,8 +75,6 @@ export interface GetCompetitivePricingForAsinParameters {
   [key: string]: string | string[]
 }
 
-export type ItemCondition = 'Any' | 'New' | 'Used' | 'Collectible' | 'Refurbished' | 'Club'
-
 export interface GetLowestOfferListingsForSkuParameters {
   SellerSKUList: string[]
   MarketplaceId: string
diff --git a/test/unit/__snapshots__/products.test.ts.snap b/test/unit/__snapshots__/products.test.ts.snap
index 7c5b1962..cbc470e8 100644
--- a/test/unit/__snapshots__/products.test.ts.snap
+++ b/test/unit/__snapshots__/products.test.ts.snap
@@ -397,7 +397,7 @@ Array [
       "ItemCondition": "New",
       "MarketplaceId": "ATVPDKIKX0DER",
       "SellerSKU": "GE Product",
-      "TimeOfOfferChange": "2015-07-19T23:15:11.859Z",
+      "TimeOfOfferChange": 2015-07-19T23:15:11.859Z,
     },
     "Offers": Object {
       "Offer": Object {