I did 130k hard miles from new over 7 years in a 2001 Spider V6, I had it main-dealer maintained until 90k, including Cam belt @ 72k, and then serviced regularly by my local garage (non specialist).
Some things went wrong throughout the life of the car e.g. 30k, 70k & 105k for rear shocks, had the leaking oil cooler replaced 3 times at 65k, 90k & 120k, suspension bushes done only once, front shocks once (although probably the latter needed doing more than once. Apart from the electrics, generally things started to go wrong more towards the higher end of its life - including a very noisy gearbox, clattery engine. It eventually overheated with failed water pump and cracked a cylinder head - now not ecconomic to repair. I estiamte with servicing and repairs (not consumables, insurance etc) it cost me a total of £35k over seven years = £5k per year.
So I would say, buy the low mileage car and get the essential/ necessary work done, it doesnt mean its not been maintained or in good nick!
I've followed my own advice and recently got another V6 Spider (2002) with only 43k miles but has the Q2 Diff, I immediately got the cam belt and water pump replaced.
Aginst that, the ABS unit has now packed up, £1k in parts alone, but at least I've got a "spare parts" car in the garage!