Ebay only works if you know what designers to look for... or have hours and hours to scroll through crap.
Here's a site I stumbled upon (in case anyone cares)... seems to have many of the TOP designers thats not commonly known... so I've been looking up cool designers from this site:
http://www.couturemoda.net/men.asp
Find the designers from above site then buy from ebay... b/c the above couture site is too EXPENSIVE !
FYI