Blown headgasket that lead to further damage?

I would just throw it on eBay and craigslist for "best offer".

Worst case you should get $500 in scrap for it.

Another idea would be to part it out and try to sell parts individually. Huge PITA, though.

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2002 X5 4.6is - Titanium Silver / Black Alcantara - Dinan Stage 2 - Bilstein/Eibach - Brembo BBK ----SOLD---
1993 318i - Brilliantrot / Tan - bone stock daily driver