Villain Comics (the iPhone app): your collection, photos, grades and sales live on your iPhone and in your own iCloud. This bridge only helps your phone talk to eBay: it signs you in to eBay (your sign-in is encrypted so only your phone can read it), renews that sign-in when your phone asks, and shares public eBay price searches between users. It keeps no account, collection or personal data, and never logs your eBay sign-in.