Bidvoy is a product value tracking service for eBay. By examining eBay auction data, Bidvoy tracks price trends for products over time, allowing you to examine that products average price, changes in value over time, and price margin. Use Bidvoy's information to decide when to buy, or sell, a product.
Bidvoy offer a simple API for developers. Example API methods include category, for retrieving objects and lists based on search criteria, and article, for retrieving statistical data based on a given product and category. An API key is required.