Site friendly as cex.io (fast buy and sell)
scrypt.cc - 1000 dollars per 1000khs
markets - 600 dollars per 1000khs
PC with 4 r9 280x (3000khs) - 2500 dollars or smth
I bought a couple of 260x's, & some 270's several months ago...... the 260x's came with the 2 free games (Thief + x), the 270's came with a $20 MRI (which I didnt use, but would have brought the cost down to $160).... the 260x after selling games (right at this moment Thief + Dirt 3 would be the best choices) would be around $100
so, my equipment has appreciated in value. I can sell it used for more than I paid retail
these 'cloud mining' places are all massive ripoffs