Well, an on-hand Avalon batch 1 goes for around 3-40k, which is around 470~BTC for 63 Gh/s. By this logic, the fair price for a 10GH/s device like this would be around 80~BTC.
shhhhhhhhh
They only went for 30K - 40K because BTC was trading @$200+
You mine BTC with them, not $, so my guess is with BTC being down over 60%, the prices of those Avalons will also be down 60%