I was a victim of someone doing what RedneckChikns was proposing (but using CraigsList, not an auction) when I was trying to rebuild my flock after a hawk attack. (6 of 7 killed.) I lost one bird and still have 5 in isolation trying to recover. I chose NOT to kill/clean/start-over. I now have a closed flock; no bird will ever leave (alive). But, I can hatch eggs and/or add new birds as necessary. (Just have to do it carefully.) I can (and do) sell eggs at the local Farmer's Market, but they are for eating - not hatching. (I only have one Roo, so hatch rate would be REALLY bad if someone tried. He's there to be the sacrificial chicken and give the ladies time to hide.) So you have to decide how badly you want to sell hatching eggs, and if it is worth the time & expense of starting over. For me...no; for you...???