If these so called Chinese versions are found to be equivalent to the Canadian branded ones, I'd say they are worth every penny at those high Ebay prices. The Canadian units are clean, quiet, quite analog sounding, absolutely bulletproof, have a great PC tool UI, and interface well with home and pro audio gear. Plus, Roy has provided settings for UJ on the XP units.
I would be interested in comparing to the originals. Hopefully the same.