I bought a Vectra 4 years ago as a fairly low mileage (9K) 9 month old 1 owner car as a day to day run around. I gave me no problems at all. I was surprised when I found out that the 1 owner was a car hire company - so you never know what you will get, sold it at 60K miles 2 years later
Bought Chevey ex demo 5K miles to replace it - still got it 54K miles some minor issues (heater fan packed up during hot weather took Bosch a week to get a replacement and strangely a new steering wheel (finish peeled off) new gear **** - developed sharp edge but that's it) luck of the draw I guess.