Because he got an item of my Amazon wishlist, the most recently added one even though I've been looking at it for close to a decade: the tiny-vanity-press-published My Little Pony [Generation 1] Collector's Inventory, a resource that is impossible to find cheap, and which is everything I dreamed it would be AND MORE.
Full color photos of every single U.S. pony, accessory and related item ever produced in the only run of MLP that matters, along with a short blurb about when they were first introduced and if they were mail-order, etc. along with a pricing guide so you can gauge rarity (just assume everything is more expensive than stated). Now I don't have to worry about the ID websites going down! It is a heavenly dream and I cannot stop paging through it in awe. It is a true Cave of Wonders catalog of splendor, including many outfits and playsets I've never even seen before (there are HALLOWEEN COSTUMES FOR THE BABY PONIES OMG).