Actually, i would say that people with a minimum of wisdom will not trust that a gecko have been bred by a certain person if they do not get it directly from this same person...
I'll give a total opposite wiew point and I'm not agreeing with the few comments below, i keep my morelias in groups since long years and i never got any problem (even my breeders are in groups in big vivs), they'll not compete anything if you provide enough of everything for everyone and tke...