Is it worth it to buy an 87 turbo II $3500? I'm not sure if I want to because it has not ac and I live in Florida. How much would it be to put ac in it ?

 

if you want the car and everything with it checks out to be solid, then yes it's worth it. however, that's just my opinion. others may feel differently (you might, too) and that's no less valid.

installing a system after the fact will depend on quite a few variables - basically, new vs. used parts and who will be installing it.

 

It's value is greatly dependent upon rebuild status, paperwork, mileage, etc.