Ebay is very tricky. Great deals often turn into bad deals when "small scuffs" turn into "laid down a few times" or alignment issues, factory seconds being sold as new, etc.

BUT patience is KEY. I just picked up a near new Fizik Aliante Titanium/Carbon saddle with their clip system bag for $20, less than 100 miles on it (so they say, but appearance wise I believe it). Ive been shopping for a few months for one.

Another trick is to search for Typos and poor descriptions or no pictures (if its local), which slows bidding a lot.