You can get these from reputable dealers pretty cheap even if you have to order them
Here is the first example I came across (zero searching around)
Sciaenochromis Fryeri
shipment is 40 bucks and you can get easily 40 fish in a box making shipment as low as 1 dollar a fish so you can order multiple types. Best thing to do is do a group order which is not too hard to do but even if you dont you still have options
Lets say you want 9 fish at roughly 7 dollars each and it costs you 40 bucks to ship that's 103 dollars and you get 9 quality fish.
Let's say you are buying juveniles to statistically make sure you get at least 1 m and 1 f it is recommended you get 6 fish(20 bucks each)... So that turns out to be 120+7.5% tax=129 dollars
Even if you go with 5 that would be 107+ dollars.. Id rather go with the 4 or 5 extra fish for the same price.... If you have extras you can take it to the Raleigh Aquarium Society Auction and spread the love!
BTW this is not a comment on the price for RJB... that is a full adult fish and a Good Deal!