Check http://www.aquabid.com right now. They're selling zebra otos at $10 each. Shipping, of course, costs $30 or thereabouts, but if you got 5 or so, you'd off-set the price of buying them in the store. They're really tough to find elsewhere

Well, liveaquaria.com used to carry this beauty (L-340) for about $70 if I remember correctly. They stopped about 3 months ago. I've not seen one for sale anywhere since.