It dosen't get much cheaper after you factor in Overnight Shipping cost. Even if you pay $25-$30 for a Bichir and then add shipping which can run between $35-$45 for overnight you are right back up to my cost. What type of Bichir are you looking for and what Price range are you looking for.
You live in miami and can't find a senegal in your LFS's? Should be able to find a small sen for $6-$12 easy. Try petsmart's. Yeah you'll have to QT it for a good while, but it's cheap.