i helped a buddy switch out the motor on an early generation miata. i dont know what happened to the old motor or how many miles the car had..but it apparently had to go. i seem to remember my friend buying a low mile replacement for around $800. he was stoned the entire time..and i had no idea what we were doing. despite this, the install was pretty easy. how i avoided the contact high was amazing. the supply of cola and doritos was never ending