Prices are all over the place around here. When I was looking last year I saw them from $15 to 23K. After a year I gave up looking and went out of state to get what I wanted... A fully built and ready to go car , I didnt want or check stock ones. With winter coming I would expect a few to be dumping so as not to store them. Seen one in west mi. online either red or orange KB coupe for a 16k might be worth a look. No way id buy a stock one unless its super low miles and mint.
I paid 16k for my old SB car 77k miles, pullied, cai, exhaust.
If you plan on modding then I'd look for one with a few simple mods. You can easily dump 1500, in cai, mid pipe, catback, pulley and tune. Might as well buy one with that stuff if you plan to do it in the future as it'll save you money in the long run.