Used T model Thinkpad probably? That's the least original advice you're going to get if you ask a bunch of nerds, and these guys know their computers ;)

if you're in the US/Canada, you could do much worse than going on the "windows laptops on sale" page of bestbuy, e.g. this one is 330: https://www.bestbuy.com/product/asus-vivobook-14-14-fhd-lapt...

i don't think it makes much sense to recommend specific craptops, every manufacturer seems to have a bazillion SKUs they reset every six months in that price range... buy whatever's on sale :p

or buy used of course

Just go on eBay and find whatever ThinkPad fits your budget