Jquery-ebayshoppingapi is a project mainly written in ..., it's free.
eBay Shopping API Plugin for jQuery
Written by Thomas Parslow ([email protected]) http://www.almostobsolete.net/
Perform searches and get item details from eBay using their Shopping API.
See http://developer.ebay.com/DevZone/shopping/docs/CallRef/index.html for a list of supported method calls.
You must set up your appid before use.
$.ebay.appid = "<your appid here>"
If you don't have an appid then sign up at http://developer.ebay.com/join/
You can then make calls to any of the Shopping API methods using $.ebay.call(method, arguments, callback):
$.ebay.call("FindItems",
{QueryKeywords: "ipod nano 4gb"},
function (response) {
alert(response.Item.length + " items found");
});