Uhhh yeah a GTX 1080 is absolutely still top of the line. I'm keeping mine for another two years unless my money situation changes drastically soon. Or until Nvidia stops putting their sausages into their customer's keisters. Don't let the tech industry pull one over on you, you do NOT need any kind of RTX unless you absolutely HAVE to have top of the top of the top of the line. As of now, RTX is a fad. It's a joke in terms of what the customers get from price to performance ratio. If you have money to burn, okay yes, it's awesome. If not, it's a slap to the face. Like all techonlogy that jumps quicker than the industry can keep up with, it's going to be a good loooong while before we see games using RTX in the everyday scenario that doesn't utterly destroy the FPS.
So absolutely, if you can find a 1080 that's around 350-420, do it. I just sold one on ebay for 500 bucks (I wasn't scamming, that was the Buy It Now price and for some reason someone did it; there wasn't even any bids yet lmao, which I will not argue against since I'm broke) so there is still a HUGE market for it because again, anyone that knows the technology beyond laymen terms knows that a 1080 is still an extremely powerful card that, unless you're going 4K, is good to go for at least a couple years to come.
It's a weird time for the GPU industry because we've got mining cards on the market still, we've got RTX breaking out of the gates saying that it's revolutionary when in reality it's nothing more than a fad (twice over, barring those that have the money and monitors for it) and Nvidia is sitting on a goldmine of Pascal cards that are perfectly adequate (or more so, in my opinion, when it comes to the 1080ti). Be wary, look in detail over what cards your buying (i.e. don't buy an ebay card that uses stock photos that is SUPER cheap and also don't buy a card that has "mining" every other word because it's probably someone trying to slip their beef in your taco).
eBay absolutely has the price to performance ratio down, you just have to look for it. There's tons of people out there wanting to upgrade that will sell off their near-perfect 1080's for a whoooole lot cheaper than retail price, it just takes a little detail oriented eyeing and some luck.
In actual video game news. RESIDENT EVIL 2 REMAKE DEMO MY BOIS!!!! I'M ABOUT TO PLAY IT AHHHH! I cannot believe it's 30 minute demo but I know that once I'm done I'll be glad because I'd literally play it every day until the actual game releases if there was no cut off and probably get burned out. I never thought this would happen after how long the wait between the REmake and RE2...make. But it's here. Kind of. Fuck YES.