Well, for those who can still find the games for $4.99, and are trying to figure out what's good, here's a list of all* the XBox games that rated a 7.0 or higher (out of 10) at Gamespot. 8.5 and above are
boldfaced.
* I removed most of the football/basketball/baseball/golf games, as I?m not a sports guy and never play sports video games. They totaled about 15 games IIRC.
In all but two cases, this was the rating from an official review. Exceptions are noted below.
Baldurs Gate: Dark Alliance - 8.5
Blood Omen 2 - 7.6
Blood Rayne - 7.2
Buffy the Vampire Slayer - 8.3
Burnout 2 - 8.6
Colin McRae Rally 3 - 8.6
Crimson Sea - 7.5
Dead or Alive 3 - 7.9
Dead To Rights - 7.6
DOA Beach Volleyball - 6.0.
But... she... kicks... high. 
Dynasty Warriors 3 - 7.3
Fatal Frame - 7.7
Gladius - 8.4
Harry Potter And The Chamber Of Secrets - 7.3
Haunted Mansion - 7.0
Metal Gear Solid: Substance - 8.7
Mojo - XBox ver not reviewed (Xbox Magazine gave it 7.3/10)
Morrowind (Game of the Year Edition) - 7.9
Moto GP2 - 8.9
Motor Trend: Lotus Challenge - Not reviewed (user rating is 7.7)
New Legends - 7.0
Oddworld: Munch's Oddysee - 7.9
Panzer Dragoon Orta - 9.0
Pirates of the Caribbean - 7.6
Pro Race Driver - 7.7
Quantum Redshift - 7.1
Rayman 3: Hoodlum Havoc - 8.1
Roadkill - 7.6
Serious Sam - 8.5
Shenmue 2 - 7.3
Silent Hill 2 - 7.9
Splashdown - 8.2
Star Wars: Clone Wars - 7.5
Star Wars: Jedi Outcast - 8.3
State of Emergency - 7.8
SWAT [Global Strike Team] - 8.1
Syberia - 8.1
The Thing - 8.4
Voodoo Vince - 7.8
Wakeboarding Unleashed - 7.3
XGRA: [Extreme-G Racing Association] - 7.4