Of course the OP can do whatever he'd like with them. Everything offered here is just an opinion, one way or another. There's no one that can forbid him to destroy the fry, or keep them all to himself. Just know that for every person who thinks it's a great idea to grow them out and market them, someone else will disagree. Ah, the beauty of a discussion forum.
Personally, I wouldn't sell fish if they were hybrids. Take MFK's Central/South American board as a perfect example. How many ID threads do we see each week where people pick up some unknown fish at an LFS and everyone jumps in and says, "Hybrid!" Are there really so many hybrids floating around that each unlabeled LFS purchase is automatically suspected to be one?
But here's a personal example: I've bred and sold a few different species of SA cichlids here on MFK. Let's say for each spawn, I end up selling fish to ten people online. What are the chances those ten people are going to hold onto those fish forever? I've personally bought back fish that I've sold after seeing them re-listed for sale here. I have also seen fry that I sold locally turn up later in various shops around the area, meaning someone kept it for a few months and then dumped it at the LFS.
So even if you don't intentionally sell hybrids to an LFS, they could still find their way there. Then they get dumped in some "assorted cichlid" tank, and before you know it there's a thread here where someone's purchased them and is asking for an ID. And everyone jumps on board and says, "Hybrid!" The cycle repeats itself.
Again, I'm not telling OP what he should or shouldn't do, just why I personally don't do it.
