I have never owned older Fcars, only Porsches 9since 1968) but what would put me off is the cost of maintenance on older Fcars if you really drove the car very much. The engine out service on the F355, also I believe the 348 and TR as well. That plus getting the service records of older and multiple owner cars can be problematical so you are not sure what you are getting even with a PPI. I guess if I was able to do all the work on the car myself and had the skill set to do it then it would not bother me so much? While Porsches are not cheap to maintain, Fcars are a whole new dimension if you are not doing the work yourself. Since you seem to be fairly new to Fchat, I suggest you do some searches under those particular models. Look under the Forums for those models and search maintenance, prices etc. I am sure I have seen some threads on the information you are interested.