Used car philosophy

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I am in the market for a new X5..

My usual buying philosophy is to buy a 3-5 year old car with low miles and then flip it in a few years.

I was looking through 2011-2012 X5's between 40-60k miles but then came across a posting for a 2007 X5 with less than 10k miles.

the car is way out of my year range but its basically a brand new vehicle.

My question is how much of an impact does year have on wear and tear vs actual mileage? How much actual wear and tear is there from letting a car sit there without driving it for years..?


I dont know if it has been garage kept.

would i be better off with a 40-50k 2011 or a 10k miles 2007?


thank you all in advance

cheers!