Well, what do you mean by best offer? You need to tell us a price. Also, are the keys legally or illegally obtained? Do you accept escrow?
Without answering the basic questions here you wont be able to sell anything here on this forum

BTW, double posting is not allowed here. You have another thread here: https://bitcointalk.org/index.php?topic=1028250.msg11119877#msg11119877