OK I understand you don't know where it orginaly came from but do you know that it was locally caught? My point is if NBS are common in your area (I believe they are) you can let them go, no problem. That said it should be SOON before winter weather hits hard.

Now on the crooked neck. Not sure exactly what you mean but many times kinks be they in the neck or the back are due to developmental problems mostly related to tempetarture during incubation of eggs. Small as the eggs are I imagine you just found babies one day, right? If the temps got a bit low that could have caused the kink.

Anyway, there is not much demand for them in the pet trade, if you do want to see if anyone is interested you might try CraigsList to see if anyone wants them locally. I doubt anyone would pay any more then say 5-10 bucks.

I would let them go at least the ones you don't want to keep personally. I know a lot of guys that keep corals feed small snakes to them so the guy who wants them all may not be the best thing for them. Good thing to ask before you rehome them to anyone,