I prefer to sell these in a lot so make offers.
Dreamcast (all complete):
F355 Challenge
Atari Anniversary Edition
Dave Mirra Freestyle BMX
Razor Freestyle Scooter
Jet Grind Radio
Last Blade 2
Marvel vs. Capcom 2
Sonic Adventure
Sonic Adventure 2
Spawn
Xtreme Sports
Fighting Force 2
The House of the Dead 2
F1 World Grand Prix
Soul Calibur
Sword of the Berserk: Guts' Rage
Crazy Taxi
Crazy Taxi 2
Hydro Thunder
D2
Ready 2 Rumble Boxing
Sega Rally 2
Max Steel Covert Missions
Virtua Tennis
Unreal Tournament
UFC: Ultimate Fighting Championship
Tomb Raider: Chronicles
Tom Clancy's Rainbow Six
Test Drive Le Mans
Space Channel 5
Soul Fighter
Sega Smash Pack: Volume 1
Silver
I also have a Dreamcast system with a vga adapter that I'd like to sell. It comes with 1 controller and a VMU (and all the cables + vga adapter, obviously). I'd probably toss it all in with the game lot if someone wants to buy it.
NES:
North & South