Amazon has the Acer A770 on sale for $250. That’s a lot of compute with 16GB of VRAM for $250. There is no better value. It does have it’s challenges. Somethings like MLC Chat run with no fuss just like on any other card. Other things need some effort like Oob, Fastchat and BigDL. But support for it is getting better and better everyday. At this price, I’m tempted to get another. I have seen some reports of running multi-GPU setups with the A770.
It also comes with Assassins Mirage for those people that still use their GPUs to game.
Used is not the same as new. Also, a P40 can’t be used as a GPU like with graphics. No video out. These can.