BayTree - Version 1.2 Displays eBay, the world's largest online auction, in a convenient tree. Get to the right category fast. Find new categories you may have missed. Use the item list to save descriptions of items you are tracking for quick access. Create fast searches that you can save to disk. Use the built-in browser or your favorite, BayTree works with either. BayTree makes eBay more fun and saves you time.