Narrow it down to a breed for me and I'll find you a seller. If you want I can help narrow it down, what colors are you interested in getting? My personal favorite are blue and red gularis, but they are a bit expensive. Many of the Australe and Fundulopanchax (you know you've kept too many killis when you can actually spell that) varieties display beautiful coloration and are very active and suitable for community tanks alsoHahaha, not sure what type. Not annuals, that's for sure!
I'd love it if you could point me to a seller, then maybe I could choose between killies, endlers, or guppies