I've been selling these guys, and they sold fairly quickly. I still have about 20 JBS, mostly male, and about 50 half blacks AOC. I'm getting rid of all my guppies because I don't have the room for them anymore, and they're taking up my betta spawn tanks.
Why don't you just leave them where they are? Don't separate the females to spawn, and the fry that can make it, will. That's what I do. I went on vacation and I came home to 4 fry and when I set up my new, lager tank that I'm going to be growing out my snails in, there were only 3 left. Natural selection. Those 3 are now juvies. One male and 2 females. They belong to my kiddos anyways.