I think reputation plays a big part. I don't even look at classified ads unless I've got some idea who the seller is. After you've built a reputation, your quality should do the talking and your prices, if they're resonable, should be respected.
(Not to say that you're not a good breeder
I felt a similar frustration this summer trying to sell some snakes at a show when the booth across the hall had the same animals for 1/2 the price. I decided I'd rather chance it and rely on my sales skills rather than "give" my stock away. I did some trades and some "smooth talking" and I ended coming back with very little at the end of the show.
Breedeing is half the battle, but sales is the other half and a lot of people fail to realize that...