Amazon has great coupon values however, here are a few things you should note: The coupons are valid for a limited time only. If you do not purchase the qualifying items added to your Cart when the coupon is in effect, the discount will not show up. The coupon may only be used on www.amazon.com and in conjunction with the purchase of products shipped and sold by Amazon.com and not on products sold by third-party sellers. Also, the coupons cannot be combinable with mail-in rebates. Which is true for most coupons. Last, if you return any of the items purchased with a coupon, the coupon discount or value may be subtracted from the return credit.