I have a lightly used UM2 that has been converted to 1.75 mm filament using the olsson block kit sold by GR8 here on the forum. I have the 3mm nozzle that came with the printer that you could use to convert it back if needed. I am looking to get $1700 and can ship anywhere in the continental US for that price. Shipping oversea's I would have to see what the cost would be. Open to offers so if you interested let me know.
Thanks,
Chad