pinn I hope you find a buyer, maybe you already have. 

If not, there are a couple of bots on peerbet that will buy your vouchers from you.  One is called devil and the other is voucher.  I've used both and they are legit.  However, they pay out a small fraction of the face value of the voucher, only about 1:15 or 1:10 or so.

Good Luck!