Thanks for all the info....
If I'm doing the math right...
FCO-Termini= 14 euros x2
Termini to Napoli centrale= 58 euros x2
Transfer from Naples to Positano has been quoted as 120 euros
244 euros to get to Positano (at least)
and then back to Firenze (where we would rent a car)
Positano to Naples another 120 euros
Naples to Firenze 78 euros x2
276 euros to get from Positano to Firenze
So, before I rent a car I'm out 520 euros for transport ....
With those costs in mind, I can rent a Ford Fiesta for 310 euros (I have to have an automatic; I haven't driven stick in 15 years)... for 8 days. I know I still have to factor in the petrol and tolls but given that I have free parking in Positano and I know I want to visit Ravello; what do you guys think???