If you want to get this card moving I suggest adjusting your price according to the market value of these cards. I see GTX 980 Ti's going for anywhere between $390 - $450 USD on eBay. Subtract a  ~ 13% fee from that for eBay and PayPal fees, and you end up with a range of $340 to $390 USD. If you priced your card somewhere right in that 0.85 BTC range I suspect it would move fairly quickly.