I just ran across this offer at gamestop on this page http://www.gamestop.com/default.asp?sect=1203
Here the text from the pop up window.
If you're gunna buy something from GS within those guidelines then why not add a free N64 to your order.Free Preowned Nintendo 64 System!
STEP 1: ADD a preowned Nintendo GameCube to your cart.
STEP 2: ADD any in-stock preowned Video Game or DVD to your cart.
STEP 3: ADD a preowned Nintendo 64 system to your cart.
STEP 4: ENTER the code FREEN64 into the coupon box on your shopping cart page.
STEP 5: PROCEED to checkout. Discount will be applied at checkout!
Terms & Conditions
Terms of offer subject to change or termination at any time. No dealers or resellers, please. Not valid with bundled items. Only one free Nintendo 64 per order. All items must be in stock before offer is valid. Offer not valid in stores.