Seems like an easy enough expansion with the existing site infrastructure:

Gamecube, SNES, and Sega Genesis hardware/software currently has linked data to Gamestop.com.

Gamestop categorizes these items as Retro.

Other Retro hardware/software (Gameboy, Gameboy Color, PS1, PS2, etc.) do not have linked data to Gamestop.com.

Please link this data for us! I for one would be a much more informed buyer! I'm getting fed up with botched eBay orders and Facebook Marketplace purchases, and am exploring Gamestop as an (often cheaper) alternative to Amazon for my purchases. 

Would love for Price Charting to become more robust in this way.

Being able To browse other user's collections would be quite nice.  Make other users findable on the site but let people opt-out of this feature if they want.

Prices are innacurate for me as I live in Australia and its only possible to view average prices from US ebay.

I tried to look up Silent Hill and Final Fantasy IX and there was no information on those for PlayStation 2. Except when I typed in Final Fantasy IX it popped up a screen directly for that, but I think the information is wrong on it because it says the loose price  is worth more than the complete set. I could use a price chart for both of those games please.

currently the Best offer price is always set to USD amount . This could lead to confusion.

Hello. An app for my iPhone will be nice. What about making an app so I can have easy access to my collection please. Thank You. 

Add a listing for the special edition which came with a plush and in a big box

Shin Megami Tensei: Devil Summoner 2: Raidou Kuzunoha vs. King Abaddon

I have two copies of Final Fantasy XIII for the Xbox 360; the NTSC and the PAL. Only the NTSC version is listed on the site. Need to add PAL version.

Descriptions below the game so you know what kind of game it is.