Welcome to MFK! As for buying oddballs we've got alot of great vendors here, just check the classified links. What you buy should be based on what size tank you have. Personally among small oddballs for a 55-75 gallon tank, my favorites would be Congo or Hairy Puffers. You cant comm them, but they're awesome and interesting. Another great choice are Gulper Cats again you can't comm them, but they're are few fish as cool as these guys. At 11 inches and being fairly inactive you could keep a couple of these guys together.