I've had good experiences buying from Mwave (mostly computer hardware). There are some good deals there:
Ground Control II for $5.75
Gangland for $7.99
R6: 3 Raven Shield for $8.99 or R6: 3 Gold (includes Athena Sword) for $9.99
Spellforce for $9.49
Tribes: Vengeance for $9.49
UT 2004...