Non-MMOs:

Spore - $20
Bioshock - $15

MMOs with discs and account:

Warhammer Online - lvl 11 Orc and lvl 13 Rune Priest plus other alts. Also comes with two special pre-order in game items. 40 is the highest lvl. Comes with probably ~25g among all characters. - $40. Retail is $45 brand new. **Does not come with game discs or box. The game was downloaded via www.direct2drive.com. I can send the 9.33GB file via AIM, MSN, or whatever.
http://www.amazon.com/Warhammer-Online-Age-Reckoning-Pc/dp/B000TD3IA2/ref=sr_1_1?ie=UTF8&s=videogames&qid=1225867845&sr=8-1

Age of Conan - lvl 20 assassin plus alts. 80 is the highest lvl. $30. Retail is ~$35 brand new.
http://www.amazon.com/Age-Conan-Hyborian-Adventures-Pc/dp/B000RZPW9W/ref=sr_1_1?ie=UTF8&s=videogames&qid=1225867941&sr=1-1

Guild Wars - Comes with both GOTY edition and Nightfall. I think there are 2 or 3 characters in the lvl 8 to 12 range. 20 is the highest level. $25 for both. Retail is ~$20 each for GOTY and Nightfall.
GOTY: http://www.amazon.com/Guild-Wars-Pc/dp/B0002BJQDY/ref=sr_1_5?ie=UTF8&s=videogames&qid=1225868096&sr=1-5
Nightfall: http://www.newegg.com/Product/Product.aspx?Item=N82E16832197004&nm_mc=OTC-Froogle&cm_mmc=OTC-Froogle--Software+-+PC+Games--NCsoft-_-32197004

If you're crazy enough to want the whole lot, $100 takes everything.