As far as selling there are various venues here, Fauna Classified, Kingsnake.com, TRR Market Place, Morph Market, Facebook, vending at shows, wholesaling animals.
Now producing animals and finding a place to sell them is only 1 part of the equation the second part is to establish a reputation by getting involve in the reptile community and have people know who you are, if people never heard of you (and I am not talking about sales) it will be much more difficult for people to buy from you.
As far as how do you know that the animal will be well taking care off? It's a leap of faith because no matter how you gauge people you never know what will happen. Every time I sell an animal all I can do is hope for the best which I am sure happens however once they are out of my hands I no longer have any control.
I personally sell my animals online for the most part, I do not vend at show, I sell on the various places I have mentioned, in the past 2 years I have had great success in various facebook classified group, I also wholesale normals and low end single and double gene animals as well as some hets.