amazon coin is value at 1cent per coin

and you get 50% off for each coin purchase

http://www.amazon.com/Amazon-1000-Coins/dp/B0096E8DAU/ref=sr_1_1?s=miscellaneous&ie=UTF8&qid=1398906276&sr=1-1&keywords=amazon+coins

you can get 2500 coin with 23$ USD which can be converted to 35$ if you include the 50% refund which limit as 10,000 coin per day