Walmart offers Mass Effect 2 for Xbox 360
for $10.96. Shipping adds $1.97 or choose free Site-to-Store. Even with shipping, that's $3 under our mention from three days ago and the lowest total price we could find by $7, although we saw it for $2 less on Black Friday (since expired). Sales tax is added where applicable.
Update: Amazon.com dropped its price to $10.96 with free shipping. That's tied with our Black Friday mention and $2 under Walmart's offer.