I did just that. I sold my rx6800 and replaced it with a lower power card, an RX6600xt. The s/h prices of all cards that I was looking at were (and still are) stupidly high) £300 for an rx580 8gb, £400 for a 2060 (non super), rx5600xt for £450ish, Vega 56 around £500......the list goes on and on. I got the sapphire pulse rx6600xt for £419 from here brand new, warranty, I know the history of it too. Rx5700xt performance or slightly better, cooler, quieter and less power hungry, and its not that bad at running games quite frankly, just overpriced really by about £100 from what it really should be. Also the 3060 and 3060ti are just too expensive really, if the 3060ti was around £400-£450 then that would be the better choice imho.