Walmart.com has the Halo 3 (Legendary Edition) priced at $59.82 + $7 shipping = $67 shipped.
Option to have it shipped to your local store to avoid shipping.
This limited edition version of Halo 3 comes with a Spartan Mjolnir Mark VI Helmet Case, Bonus Discs, The Cortana Chronicles and other Halo goodies.
Check it out: Walmart.com - Halo 3 Legendary Edition Xbox 360
[Submitted by johngeer, Thanks!]