Oh man, this thread is great! There are so many posts I want to reply to directly! I'll summarize here so I don't spam
PC Games:
My original copy of Doom II I ordered via the mail (I still have all of it, box included). I spent a lot of time playing this one! Also played it a lot via modem
Aces over Europe (same as above, not sure where I got it though, but I bought it brand new). I spent a lot of time playing this one as well!
Console Games:
The remaining items I have from my original NES set, which is almost entirely boxes for games. Many of these are smashed and would not be desirable to anyone, but I love them
[ RESERVED FOR PHOTO ]
I love prototypes and all of my protos are special to me.
Misc:
Misc Dragon Quest items I've accumulated, including the silver PS4 DQ console (with metal slime figure and metal slime controller) and a slime mini figure
I love Tetris, so all of the Tetris games I've picked up are special to me and I'd likely not sell them.