What are the specs of the system? I think currently the best value in the market is probably the RX 6600 since you get almost 3060 performance for less cost than the rtx 3050. You could go 6600xt which is a fine card as well but I think the 6600 is only about 10% behind and that card costs more.
If you want 1440p, I’d look at the 3060ti, 6700xt or 3070 depending on budget. Personally I’ve got a 6700xt that I bought used for just over $400, and am using it at 1080p 144hz. It seems to perform very well for that purpose. But I did try a 6600xt before and that is a fine card as well. I think it’s hard to go wrong.
If you feel brave though and really want to save money I’m seeing used rx 6600 cards on eBay for $250, saw some 6600xt cards for $260 and 20 in shipping. I personally don’t mind used sometimes but some do. In the case of my card, it said it was a manufacturer refurbished card, but I paid 423 or so for it. It arrived in a plain box and looked brand new tbh. Never an issue with it whatsoever. Already played through the original tomb raider game with it, working on shadow of the tomb raider, then I still have the other one to play through after. Haven’t even touched ghost recon wildlands yet. If you can’t tell I hit the steam sale lol. But I got many of them under 10 dollars out right around there.
If you would decide to go with a used card I recommend buying through eBay since I think they have their money back guarantee. But make very sure to read the description carefully and check that the seller has good feedback so you have an idea what you are buying. But a lot of guys prefer new, I get it. I’ve had good luck the other way. It was too tempting to get the 6700xt as opposed to one of the lower cards lol.