Let's see......
NES:
All three Mario's
Solar Jetman
Base Wars
The original Final Fantasy
SNES:
Secret of Mana
Chrono-Trigger
Gradius III
All Final Fantasy versions for SNES
Street Fighter II Turbo
Killer Instinct
Super R Type
PSX:
Xenogears
Test Drive 4 and 5
Demolition Racer
Final Fantasy VII
Gran Turismo 1 and 2
Driver
PS2:
Wizardry - Tale of the Forsaken Land
Gran Turismo III and IV
Test Drive
NASCAR Thunder 2004
PS3:
Valkiria Chronicles
Gran Turismo 6
Natural Doctrine
That's not all I've got or mess with but what I could think of off the top of my head.
If I still have it I'll play it but if I no longer play it I get rid of it.
Nearly everything for NES and SNES, including the systems themselves I bought new back in the day, that's also true for my PSX and PS2 stuff.
Only exception is I do have an older NES I bought used and fixed but still have the Top Loader NES I bought brandnew from Toys-R-Us.
All Game Genie's and Game Sharks were bought by myself new as well including the V-Mem module for my PSX.
Everything PS3 was bought used including the system, PS4 was already out and a thing by the time I took an interest in PS3.