A friend of mine is considering buying one of these and he's wondering what to look for, most of the ones he's seen so far are Ebay so he hasn't seen them in person so what are good questions to ask and things to look for before purchasing?

EDIT: he found one in san diego and we will be flying out to drive it back on 10/25

EDIT: EDIT: see below

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E30 B25
126.036
123.130 with 616-Frankenbenz (sold)
124.030-Greyhound (sold)
124.030-Schnauzer (sold)

DERP DERP