Ebay only archives listings for 3 months - is there a website that allows you to go further back? A corollary is can you see the original listing somewhere if you know the item number? NGC certifications. It's easy enough to verify that a coin has been certified based on the registration number; however, how do you get the date a coin was certified? This date acts as another signpost to the history of a coin but I haven't seen it available anywhere. Thanks!