p1st1l4c4 :
Can i put a 1x 8 pin card in the PC if i have 2x 6+2?
Yes. 1x 6+2-pin = 1x 8-pin.
I do not believe prices will go higher than now, because now the only prices are sky high because of very little stock. When new stock comes in, the GPU prices will go back down. But they may still be higher than they were before they began to rise again.
So, GTX 1080 that was $549 before might be $579 or even $599, when stock becomes available again.