Prices have been leveling on MM's as more MMr's hit the field. There are some MM owners that still attempt to get 12.5k for their machines, but it seems that the market realistically sits somewhere around 10k flat. If you need it sold fast, 9-9.5k would do it. If you can wait for the right bid, you may be able to get up to 10.5-11k depending on your location.
At least, that's what I've noticed over the past couple years of lurking around on these forums.
Sounds like a great machine you have mate. I'd be sad to see it leave my own collection.
Any chance you'd sell it to me in return for a goat and my neighbor's daughter's hand in marriage?