I have 3 small Burundi fronts at the moment, they were £5 each, which wasnt too bad, They are going in one 400l tank, but I am going to see if they will mix ok with my Servs and a couple of other CA's (fingers crossed).
Recently people are only selling F1 Zaire fronts which cheapest I have found are £10 for 1-2" fish! which makes them way out of my range for a species only tank. Hence the thought of a nice large group of cons in a 300l.