diff --git a/README.md b/README.md
index e6f4bea..d207c12 100644
--- a/README.md
+++ b/README.md
@@ -78,6 +78,19 @@ ebay.getAccessToken()
             // To check the format of Data, Go to this url (https://developer.ebay.com/api-     docs/buy/browse/resources/item_summary/methods/search#w4-w1-w4-SearchforItemsbyKeyword-0)
         })
     });
+
+// perform Advance Search Items by Keyword or category or both
+// Search Buy It Now ipad items with one day shipping. (https://developer.ebay.com/DevZone/finding/CallRef/findItemsAdvanced.html)
+ebay.findItemsAdvanced({
+    entriesPerPage: 2,
+    keywords: 'ipad',
+    ExpeditedShippingType: 'OneDayShipping',
+    ListingType: 'AuctionWithBIN'
+}).then((data) => {
+    console.log(data);
+}, (error) => {
+    console.log(error);
+});
 ```
 
 [More Examples](https://pajaydev.github.io/ebay-node-api)
diff --git a/demo/finding.js b/demo/finding.js
index 4d8817f..f1d975f 100644
--- a/demo/finding.js
+++ b/demo/finding.js
@@ -7,7 +7,10 @@ let ebay = new Ebay({
     clientID: clientId,
 });
 
-ebay.findItemsByCategory(10181).then((data) => {
+ebay.findItemsByCategory({
+    categoryId: 10181,
+    Condition: 1000
+}).then((data) => {
     console.log(data);
 }, (error) => {
     console.log(error);
diff --git a/package.json b/package.json
index b1779dd..f407143 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "ebay-node-api",
-  "version": "2.8.6",
+  "version": "2.8.7",
   "description": "Ebay node api client",
   "main": "./src/index.js",
   "homepage": "https://github.com/pajaydev/ebay-node-api",
diff --git a/src/buildURL.js b/src/buildURL.js
index 7d424b5..2eb9f8a 100644
--- a/src/buildURL.js
+++ b/src/buildURL.js
@@ -23,8 +23,7 @@ const buildURL = {
         baseUrl += options.param ? '&' + options.param + '=' + options.name : '';
         baseUrl += options.additionalParam ? '&' + options.additionalParam : '';
         baseUrl += options.sortOrder ? '&sortOrder=' + options.sortOrder : '';
-        baseUrl += '&outputSelector(0)=SellerInfo';
-        baseUrl += '&outputSelector(1)=PictureURLLarge';
+        baseUrl += '&outputSelector(0)=SellerInfo&outputSelector(1)=PictureURLLarge';
         baseUrl += options.limit ? '&paginationInput.entriesPerPage=' + options.limit : '';
         baseUrl += options.globalID ? '&GLOBAL-ID=' + options.globalID : '';
         baseUrl += options.pageNumber ? '&paginationInput.pageNumber=' + options.pageNumber : '';
diff --git a/src/finding.js b/src/finding.js
index 2c5c85e..46709f6 100644
--- a/src/finding.js
+++ b/src/finding.js
@@ -10,9 +10,7 @@ const FIND_ITEMS_ADV = 'findItemsAdvanced';
 const FIND_EBAY_STORES = 'findItemsIneBayStores';
 
 const findItemsByKeywords = function (options) {
-    if (!options) {
-        throw new Error('INVALID_REQUEST_PARMS --> Keyword is missing, Keyword is required');
-    }
+    if (!options) throw new Error('INVALID_REQUEST_PARMS --> Keyword is missing, Keyword is required');
     this.options.operationName = FIND_ITEMS_BY_KEYWORD;
     // support only keyword string.
     if (!options.keywords) options = { keywords: options };
@@ -24,11 +22,15 @@ const findItemsByKeywords = function (options) {
     );
 };
 
-const findItemsByCategory = function (categoryID) {
-    if (!categoryID) throw new Error('INVALID_REQUEST_PARMS --> Category ID is null or invalid');
-    this.options.name = categoryID;
+/**
+ * searches for items on eBay using specific eBay category ID numbers (input category ID numbers using categoryId).
+ * @param {Object} options
+ */
+const findItemsByCategory = function (options) {
+    if (!options) throw new Error('INVALID_REQUEST_PARMS --> Category ID is null or invalid');
+    if (!options.categoryId) options = { categoryId: options };
     this.options.operationName = FIND_ITEMS_BY_CATEGORY;
-    this.options.param = 'categoryId';
+    this.options.additionalParam = utils.constructAdditionalParams(options);
     const url = urlObject.buildSearchUrl(this.options);
     return getRequest(url).then((data) => {
         return JSON.parse(data).findItemsByCategoryResponse;
@@ -49,7 +51,6 @@ const findCompletedItems = function (options) {
     const url = urlObject.buildSearchUrl(this.options);
     return getRequest(url).then((data) => {
         return JSON.parse(data).findCompletedItemsResponse;
-
     }, console.error // eslint-disable-line no-console
     );
 };
@@ -94,7 +95,6 @@ const findItemsByProduct = function (options) {
     let url = `${urlObject.buildSearchUrl(this.options)}&productId.@type=${type}`;
     return getRequest(url).then((data) => {
         return JSON.parse(data).findItemsByProductResponse;
-
     }, console.error // eslint-disable-line no-console
     );
 };
@@ -106,7 +106,6 @@ const findItemsIneBayStores = function (options) {
     this.options.additionalParam = utils.constructAdditionalParams(options);
     return getRequest(urlObject.buildSearchUrl(this.options)).then((data) => {
         return JSON.parse(data).findItemsIneBayStoresResponse;
-
     }, console.error // eslint-disable-line no-console
     );
 };