craigslist is good too. You can use a universal search engine to search across all listings in all states: craigslist.extads.com
Here is a 40K army for sale: link
Bad news is that the search engine returns expired ads too :-(
There may be better search engines out there too. Of course, not everyone wants to ship.
I don't care for Ebay like I used to. As a seller, you have very few rights and much less than the buyer. The fees are atrocious considering what they do. Yes, I do know they have a staff but my belief is that the staff count is bloated there and they do very little that helps me as a buyer or a seller.
The other bad thing is that they managed to 'win' and we lost other auction sites. Doesn't Amazon have an auction site too?
Don't get me started about the problems I have had with Paypal and the horror stories others have had with them.