speaking of Half Price Books...I had one of my better scores today. A copy of King of Dragons for the SNES for 3.99. It was also 20% off because of their memorial day sale.
I didnt know it at the time, but this game goes for ~60 cartridge only online.
I also picked up:
Dreamcast:
Rayman 2 4.99
They had a bunch of good stuff for the Dreamcast...complete copies of Skies of Arcadia 19.99, Grandia 2 19.99, Crazy Taxi 2.99...but I had all those already.
PSX:
Rayman longbox 4.99
Resident Evil Directors Cut 9.99
free psx memory card was in the rayman case
Snes:
Pilotwings 3.99
Breath of Fire 19.99 (ok maybe this one shouldnt be in this thread lol)
Genesis (cartridge only):
Sonic spinball 2.99
Super Street Fighter 2 2.99
Adventures of Batman and Robin 4.99
Ex-Mutants 5.99
Mystic Defender 4.99
Ghouls N Ghosts 4.99
Dinosaurs for Hire 4.99
Mortal Kombat 3 4.99
Thunderfox 4.99
Ristar 4.99
Even better considering all those prices listed were a further 20% off.
Unfortunately...Ristar didnt work

. I tried cleaning it, opening it up and cleaning it and nothing. not even the white lettered opening screen. Bummer because I really wanted this game and been looking for it for a while.
Went Savers and actually found a Genesis with 2 controllers (no AC adapter and RF cable looks to be broken) for 5.99. All in all, amazing day, cant complain.