Ok a bit of a long shot but I thought someone in the know might have some input on this.

I am wondering about how flexible dealers are to do deals on 2nd had stock, for example if I went to a dealer to look at a 2006 X5 and brought my 2007 e92 along, could I negotiate a swap without money exchanging hands. I'm pretty sure the e92 would have a higher value by approx 1-1.5k but would I be dreaming thinking that I could do that kind of deal? I still have an outstanding loan balance for the e92 too, which I would continue to pay off!

Any thoughts or input?