Are you able to prove that your Amazon balance comes from a legitimate source? Otherwise I strongly suspect that you're using fraudulently obtained gift cards to be able to offer such a huge discount.
NOBODY can acquire legitimate gift cards for less than 80% of the value that's for sure, so how are you going to prove that, despite all the odds, yours are not carded?
thats true , if he could make what you ve asked for ill be very interested in it