This appears to be a very legitimate rescue organization. Now, being in MI, obviously I don't have any firsthand experience with them, so take this with a grain of salt, but I did some research into them and they seem to be very much on the up-and-up. I like how each primary volunteer is profiled and it's great that they do conservation and education as well. Their adoption fees are a touch high, but I'm comparing to fees here in MI so this might not be an accurate statement.
One definite plus is that their snakes are already on F/T rodents - no need to switch them over!
I would seriously consider "Joey" or "Sara". Both of them look really good to me from what I can tell from the pics. Sara has a scar, but if it's old and healed, that won't be any issue. The only reason I would go for one of them over "Victoria" is because her description kind of indicated that she might be more finicky about eating. No other reason.
Another reason for adopting is that, even though the rescue will keep these snakes til they find homes and they aren't in any "danger" now, when you adopt one, it allows them the room to rescue another snake who may truly be in danger.
If you are wanting just a pet, these snakes are very promising! As I said before, I couldn't be happier with my adoption experience. Good luck and keep us posted!