I purchased my X used. Sure I have some issues with it - no history, dealer doesn't want to disclose it, has some miles on it, etc. But: the build quality is very good, I changed an array of parts that were neglected, I am still changing parts here and there, doing minor & major maintenance stuff, and every time I finish a little (neglected PO maintenance) project, the X feels even better.
I don't think you can drive ANY car 250 k miles and change only oil & air filters. Or maybe you can, but then you will drive it like Fred & Barney.........

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Stable: e92is, e46 M54B25, e83 N52, e53 N62 - sold, e39 M54B30 R.I.P.