How many things have you bought because a rebate was included....but never sent in for the rebate?
Unless it was something you needed anyway, buying something because it's free (or almost free) after the rebate is only a good deal if you actually redeem the rebate. Did you know that 80% of rebates are never redeemed? Manufacturers know this and they seem to count on it when offering rebates.
Don't let it happen to you. If you buy something that offers a rebate, send the paperwork in right away and get your money back.