I dont think you are gonna find a Supra Twin Turbo with $15k, they are extremly overpirized, people sell them like for $20k with 70k miles, i had $16k and i was gonna get a Supra TT, but i could'nt find one in that prize. instead im just gonna get an Eclipse GS-T. they are nothing compare to the supra, but i really dont need all the power the supra has, im only 16

i might get killed with that car.
p.s N/A supras look the same as the Supra TT but dont have any turbos and are much slower, if you dont plan on getting a supra for racing get a N/A supra.