I had a friend sell me a NIB 3070 this past week for $850. I think he bought it for $750. MSRP of the founders edition (FE) is $500, but MSRP of all add-in board (AIB) partner cards are $600 to $900. Most US retailers are marking up 20+% above MSRP when they do have them in stock then scalpers use bots to pick them up and resell them on amazon and ebay for 2-3x MSRP. Considering I am using my card to mine ethereum (so the card pays for itself) and gaming otherwise, I think I did okay for myself even though I paid well above what would be considered reasonable pricing in a normal year.
Anyway, if you are reading this and want to buy a GPU from a retailer you have to attack on all surfaces. Scalpers likely write their own bots and spend money to have many accounts running at once (to avoid ban limits from IP and account spam detection). The higher that GPUs are valued (due to scarcity and economic value of mining), the more they will spend and the less likely you will ever get a card.
The first thing you need to do is to make accounts on all AIB sites (such as EVGA or Zotac) then enter their queue for GPUs. They sell some of their cards to people on a FIFO basis and the queue is several months long, but this is the most reliable way to get a GPU in the next two years.
The next thing you need to do is to join a few discords and follow a few twitter accounts (such as stockdrops). Keep your bestbuy, newegg, and amazon sign-ins warm on the device you will be monitoring (likely your phone).
The final thing you can do is run your own open source bot. I only know of fairgame [0]. It's limited to amazon (not a great place to look currently) and you can only check one listing every 3-5 seconds to avoid a ban. I made an account to do this and ran it for a few weeks (with no hits in the MSRP ranges). You can check out the cheat sheet (linked in the readme [1]) to see a decent list of card listings.
0. https://github.com/Hari-Nagarajan/fairgame
1. https://docs.google.com/document/d/14kZ0SNC97DFVRStnrdsJ8xbQ...