True story. Many years ago when I sold my Discovery 1, it was to a guy who was an opal buyer travelling to the various opal mining areas and buying their finds and selling them on. I was asking $24k for it, but was prepared to take $20k they guy wanted to pay in opals, but me knowing nothing about opals said no, and he said what about part cash, part opals so I agreed to $20k cash and $4k opals. The guy had a big duffel bag, he opened it up and inside was a pistol, bundles of cash and bags of opals. And he handed me $20k in bundles of fifties and I chose the opals. Stll have them somewhere.