Your comments

We have the US versions of both:

https://www.pricecharting.com/game/super-nintendo/super-nintendo-classic-edition

https://www.pricecharting.com/game/nes/nintendo-nes-classic-edition

We don't track PAL hardware at this time, just the games so I can't add the PAL versions.  I'll leave this open to see how popular that is with users.

You can see another user's collection if they share it with you.  But we do not provide any list of user's collections that you can browse and find other users?

Is that what you are referring to?

Thank you.  We don't have a full list of JP Game Gear at this time so we've chosen not to include it in the menu.  We've only added a few games that users have requested or are really rare.  We'll add it to the menu when we have a more complete list and we'll add a more complete list when we see how popular JP Game Gear is with users.

What drop down menu is it not included in?  I see it in the ones I've checked out.

It is listed as "JP Sega Game Gear"

Great to know.  Thank you.  I'm in the middle of adding Xbox and Xbox 360 PAL support.  I'll work on Saturn and Dreamcast support after those.

We won't add  that value to the value of each game because those items are not unique to each game.  We keep track of the value of each box, and manual, and cartridge/disc because those are unique to the games but those sleeves are the same for every game you add them too.  Same with protective plastic covers for boxed games.

Yes, there is some value to them but it isn't something we will add to the value of each game.

Can you give me the links to the items you found with the wrong prices on them?  I'll look them up.

Neither Silent Hill or Final Fantasy 9 came out for PS2.  They are PS1 games.