I guess they are starting to go back up, but you can get some of the earlier ones pretty reasonable. The gen 1s are very rough and tumble cars, but are still super fun. My mom has a 94 that I still really enjoy driving, even compared to my hopped up 04. Mine is pretty much better in every way, but there's just something special about hers that makes it fun. You used to be able to find them in the 20s for one with some typical use on them. Gen 3s (like mine) you could find in the 30s from time to time, but that might have creeped up since COVID messed with the used car market. I made a spreadsheet of pretty much every Viper for sale in the US back when I was looking to buy mine. Listed year, color, miles, mods, price, etc. and started working my way through them to figure out what I wanted to pursue. Narrowed it down to two cars and pulled the trigger on mine because it had a couple of mods that I found more appealing.
People at work gave me grief all the time for it, but I only needed to drive myself to work and back, so I didn't need storage space, extra seats, crazy gas mileage, etc. Their brand new pickups cost twice what I paid for my car.