x2 with a Gremlin in it - Price????

We've all been around those boats, you know, the beautiful ones that are always in and out of the shop. I have a friend with an 04 X2 that happens to be one of these. He's fed up with it, and looking to get out of it. I offered to help him sell it, but don't know what to ask for it, other than looking at NADA - Any idea's what we should ask for it, I was thinking 34