The last few weeks have seen crazy increases in newer GPUs in the used and new markets.
Thios is due to Bitcoin and Nvidia milking their position as the best compute platform. As long as people keep setting up "mining" machines, the GPUs will keep going up. Most Maxwell/Pascal GPUs have gone up $100-200 each. The 1080Ti has been hardest hit. It was always the "poor man's Titan" but now it is only $100 less than a Titan, not $300-400 less.
We were able to resist these price increase as we had stock purchased before the rise, but have now sadly had to raise prices to reflect the increased cost. If and when AMD rejoins the competitive marketplace we may see some relief.
Or if Nvidia runs another batch of Pascal cores through, but since retail is now higher on a product that they already spent R & D on, why would they bother? Dream situation for them.
MVC will lower prices again once we can secure the cards at former prices.