It would be interesting to see a ratio of how many people own a game on procecharting vs how many people have a game on their wishlist. Sorta like discogs

Is there a way to import a collection from GameValueNow.com ?

This would make it easier for people who are trying for complete sets for various consoles.

Add the ps4 console from the metal gear solid v bundle.

I would completely be for the option of Accepting Bitcoin as a Payment. Bitpay could be used or even Coinbase Commerce

When i search for lets say pokemon yellow it should pop up as soon as i type in the letters "po"

For collectors focusing on console variations or accessories for their consoles, allow filter options to narrow down a user's focus on what kind of product they're searching for.

I just find myself going back and forth from Price Charting to gamefaqs frequently, if games could be linked to gamefaqs it would give allot of info about the game, ratings, reviews etc. https://gamefaqs.gamespot.com/

there are a few missing official controllers and accessories 

also themed controllers(super smash battle pads)