your fish are nice. I guess it's just not so many people here keeping africans...
you may try cichlid-forum, cichlidforums, ***************** or nycichlids. There might be more people who are interested in these guys...
by the way, I don't think the first blue fish (Melanochromis johannii ) is good for your tank, 'cause these guys are too aggressive to be the good tankmates of your yellow labs, acei or even OB zebras...Just my idea.
Good luck for your sale...