Profiler, I was referring to
www.astromart.com in particular... so far my experiences buying/selling there (6 times) have been all good. You could try putting a WANTED ad on Astromart in the Eyepieces section and see if anyone bites; compared to the alternatives it is money well spent to join Astromart IMHO... just remember to ask a few questions of the seller to get comfortable that they are bona fide before handing over the $.
Any particular sizes you're after ?