I don't know, but they're also selling new units for $59 like other sellers.
It's best to research it first. Thanks for the heads up.
All I found was this, http://www.head-fi.org/t/616893/black-list-of-unauthorized-retailer-in-us-amazon-updated-on-20-07-2012 someone asked about World Class inc. in the 3rd page but James didn't respond and they don't seem to be blacklisted and they've been selling FiiO product for a while now so I'm gonna take a risk. It's only $22 and Amazon is real good about these kind of things so I'm not too worried.
Edited by RoMee - 1/24/14 at 6:21pm