Secret of Mana, Secret of Evermore (both german version), Terranigma and Doom on the SNES are probablu among my most valuable console games I still have.
I say I still have since I had a Sega Master System II with the game Golden Axe Warrior. The console and all it's games went lost when I moved but later I saw a pricetag of 60£ for that game alone (more than the console btw)
I also have many floppy discs from late 80's/early 90's for my PCs, among them the rather infamous port of Teenage Mutant Ninja Turtles with the impossible jump. I have however no idea what these floppies are worth - or if they even are still in working condition, as the graphics card on my old 486 PC died a few years ago.
Edit:
How much worth are european copies of Chibi-Robo! (GC) and Little King's Story (Wii)?
