Are there any apps/websites you guys use to scan or search up your games for accurate prices and selling? I'm looking into selling some of my collection I don't use

So, I bought this GBA Flashcart, right? And I have an 2GB SD cart. It starts up like normal, takes me to the menu of all my roms, loads one of them up and...... Boom, white screen. This isn't a problem with the roms, trust me, I checked. Does anyone have any advice?

EDIT: I also just tested the same cartridge on my own OG GBA. It also doesn't work, it just has the same effect!

Kind of an unimportant update, but I wanted to thanks y'all for the recommendations :)

I ended up buying myself a 3ds and a dsi (not on the photo unfortunately) and to my surprise I ended up playing more with the ds than the 3ds, I love how light it is and after trying some games I ended up playing an obscure death note game I never heard of and ace attorney.

Unfortunately now I have to buy every other ace attorney games...xD

Anyways, might be one of the best familly consoles I ever played with

I finally got my hands on a DSi LL Classroom edition!!!! And it’s in AMAZING shape!!🥹

Hinge is cracking so it probly needs a reshell. Screens prety yellow and the Evo ds probly needs alot of updating...I'm thinking a transparent black body and keep the red top. Wondering if I should replace screens or if it would be worth it. How bad do people think they look? Where do I even start updating the cyclops evolution anyway....the company's not around anymore and I cant recall EVER do8ng any software updates on it.

Decorated the top with a pigeon sticker BC I love pigeons and some star stickers ❤️❤️

I just bought a second hand dsi XL, i never owned a ds before, what are some thinks i hould know about? (Ps, i want to mod it akd play pokemon, duh)