I purchased two refurb IWill KK266R boards from Newegg. They came with all the usual retail packaging and looked brand new, although the IDE cables were obviously refolded, like someone had returned it. When I built the two machines, they had a constant reboot problem which turned out to be a problem with USB devices. I flashed both boards with the latest BIOS and the problem was cured, and I'm still using both of them one year later with absolutely no problems what so ever.
I really think their refurbs are customer returns from people who simply couldn't get the hardware to work in their system. Maybe they didn't know quite what to do or how to do it, I don't really know. Once a processor is smeared with ASIII, they can't sell it as new, so they unload it. If you buy it, and it doesn't work, quickly return it.
Just remember, if you buy a refurb you better build the system quick and test it out throughly, because the warranty is only good until 30 days after invoice date. They must receive the board by that date, so you really only get about two weeks to check it out and send it back, if you have problems.
Actually, I was just considering the refurb Epox boards they currently have...