I am just curios because they all seem to be in the 1070 pricerange. I want to buy the 580, but I at the moment they all seem to be very overpriced. I wouldn't mind buying a 1060 but I would like a 580.
I wouldn't exactly call those prices you're seeing "real" prices. Those are just a few obscure vendors trying to take advantage of these cards being out of stock. I highly doubt these vendors are moving any inventory.
I've bought from them before. They're good. Also, PCPartPicker wouldn't knowingly keep a disreputable retailer in their lists. They dropped TigerDirect because, at the time, the uncertainty of the company (closing up shop or not.)