A week ago I left several browser tabs open to GPUs on Newegg. Last Friday, I noticed them and hit refresh. About half of them showed as out-of-stock, the other half had 15% price increases. The 1060 I bought on 6/10 for $240 isn't available from Newegg, but a third party (JoyMall) has stepped in and offers them for $499. The 1070 I purchased for $410 is now $480 and limit one.
I am watching Amazon closely just because this is interesting. 1070's came in stock at $400, I added 20 to cart to see if they would add and it went through. Ordered one. Came back to order another and they were gone. A minute later jumped up to $700. All under 5 minutes of coming in stock.
edit: the 1070's are coming in and out of stock tonight for $400 on business prime.