I bought mine 1.5 years ago with 55k miles on the clock. Since then it's had...
- Quaiffe diff, the car drives so much better, it should have been standard. They're also much stronger than the standard ones which eventually blow up and can take out the gearbox (quite expensive but worth it)
- The (alfa reconditioned) gearbox turned out to be knackered anyway, so now it's got a GTV 3.0 one, works fine (not so cheap)
- Thermostat, rad hose (cheap)
- Front upper wishbones (cheap)
- 18" cloverleaf wheels because the look nice (expensive but...)
- New xenon headlight because somebody broke it and if was constantly filling up with water (not so cheap)
- Door check straps to stop the clicking (cheap)
- Bits of bodywork here and there
Apart from that, bearing in mind it's a 10 year old car, it's been pretty good! It looks great, sounds great, it's practical, can rip down a country road or cruise on the motorway. The only downsides are the crap turning circle (it's like a cruise ship) and the crap ride (but that can be fixed with new shocks).
Future plans include a new oil cooler and bottom rad pipe because they rust, but that might not be a problem in Australia?
If you're only doing a few miles a day, I'd take it for a long drive once a week, just to open it up and get it properly warm. It'd be a crime not to let that busso V6 sing anyway.