How did you come by this amount of vouchers? Surely if you bought them from bitmain themselves you would of intended on purchasing something from them. It just doesn't make much sense to me why you would have as many as you do and also willing to take a loss from the overall value of the vouchers.
I bought more then 100 asics early, but now don't need it(logistics in Russia so slow, i can get L3+/S9 only in May).