http://www.costco.com/Ryse%c2%ae%3a-Son-of-Rome-Xbox-One-Game.product.100084241.html
Cheapest I've seen it outside of when GameFly had a small stock of them for $18 used.
I know MSStore has it for $30 but they are out of stock right now. Cheapest I've seen it on Amazon.
http://www.amazon.com/Tomb-Raider-Xbox-360/dp/B004FSE52C/ref=sr_1_1?ie=UTF8&qid=1369270874&sr=8-1&keywords=tomb+raider+360
360
http://www.gamefly.com/Buy-Prototype-2/146180/
PS3
http://www.gamefly.com/Buy-Prototype-2/146175/
Also for sale for $15 and FS are Max Payne 3, The Amazing Spider-Man, and Ghost Record FS.
Sale items
:360: Brink $6.99
:360: Call of Juarez: The Cartel $7.99
:360: Duke Nukem Forever $7.99
:360: Gears of War 2 $7.99
:360: L.A. Noire $7.99
:360: Operation Flashpoint: Red River $7.99
:360...
Sorry, title should say Force Unleashed II.
http://www.amazon.com/Star-Wars-Unleashed-Collectors-Xbox-360/dp/B003O6G718/ref=sr_1_15?s=videogames&ie=UTF8&qid=1310066687&sr=1-15
http://www.amazon.com/Tales-Vesperia-Xbox-360/dp/B0015HZLVA/ref=sr_1_1?ie=UTF8&s=videogames&qid=1289026987&sr=8-1-spell
Need to spend $25 or more to get free shipping.
360
http://www.gamestop.com/Catalog/ProductDetails.aspx?product_id=76713
PS3
http://www.gamestop.com/Catalog/ProductDetails.aspx?product_id=76707
Use code GS30 to get additional $8 off and free shipping.
UPDATE: As of 7/10/10 coupon is no longer available and used copies are out of stock. Deal is currently dead.
UPDATE 2: As of 7/13/10, used copies are back in stock.
360
http://www.gamestop.com/Catalog/ProductDetails.aspx?product_id=76650
PS3...
http://www.amazon.com/gp/product/B001TOQ8UW/ref=s9_simh_gw_p63_i4?pf_rd_m=ATVPDKIKX0DER&pf_rd_s=center-2&pf_rd_r=13SR5DFCXMMK6HPQ655W&pf_rd_t=101&pf_rd_p=470938631&pf_rd_i=507846#productPromotions
Free Super Savers Shipping only free on orders more than $25.