I am looking for a decent 86-91 turbo rx-7 for a decent price. What is the best model and year to get and what should the average price be? thanks

definitely go for the series 5 turbo II
from 89-91.
minor differences in appearance, moldings, trim, that kinda stuff.
the motor is more powerful as well. i cant tell you everything about it but go to www.nopistons.com and check out the forums there