Get a 2008-2011 mustang gt
Cheap, reliable, and fast for the money. The 4.6 in the earlier years ain't nowhere near the 5.0 coyote, but it's still a great engine in its own right. They can be built but it's expensive. Will say, they can sound really good and make for a good introduction to muscle/sports cars
C4 or c5 corvette is a good option too. Usually are kept in pretty good condition. Only thing is it's low af to the ground
Hell, a 2017 and up fusion sport is a good sleeper. Underrated bur worth a look if it's one in your area. Something a bit easier to live with but still pretty quick. Transmissions are pretty weak though, so be careful