BlackMalkin

Hi, I am currently talking with someone in VT who is interested in selling their SVX. They want 1700 for it--it's a 92 with 150k miles. The only thing is, they say "it can only be driven short distances" and they don't know what the problem is, and they can't drive it far enough to get to a mechanic for a diagnostic. Should I buy it anyway? What could the problem be? I was thinking maybe the fuel pump. I need some input here as I don't really have a lot of cash for fixing a blown engine. Thanks