So far my costs have been low since everything has been DIY. The only cost that I am not sure of right now is the synchronizer replacement for the tranny but am waiting on a quote.
New rear tires, balance, alignment ($400)
Oil/Filter change ($100)
New clutch ($400)
Misc engine pieces/seals ($60)
Convertible top fix ($70)
Four universal O2 sensors spliced with existing mounts ($120)
Tranny ($???)
This totals to $1150 spent so far not including tranny. Everything else seems fine with the car (knock on wood).