Hi, I need some opinions. I am having some issues with my T5 transmission in my 87 Mustang. I was going to have it taken out and rebuilt but I found a used one with 90,000 km for $380. The seller says that it shifted fine before it was taken out. How long does a T5 typically last before a rebuild is needed? I know it would depend primarily on how it was driven but on average how long? I am not sure if I should buy the used one or have my current one rebuilt. 

