I'm in NY and out of curiousity, I asked a few people at fish stores about that, and it was even less. Like 20/$1.00 mollies and swordtails. And thats what they were paying people who they had been dealing with for years already and they didn't want or need any more. Angels they said 5/$1.00 dime-size.
I think that like anything, the rarer, (or harder to spawn) the more anyone will pay.
You might try online auction sites, which I have never used, but the biggest seems to be www.aquabid.com
Some of the prices on there seem pretty nice and they get bid on, so. . . .