I have to agree with Rick (Cazador), if you're going to get a pair, you might as well try and breed them. Even if the attitude is to just go out and catch garters (which people in Oregon can't do if they want Melanistic eastern garters!
), it's always a selling point when you provide captive bred offspring for sale. Captive bred animals are almost always healthier and better adjusted to captive conditions and thus usually make better pets. Even if you were to breed a native species to your area, I think you wouldn't have a problem selling the captive bred babies over wild caught ones. Also remember the power of the internet. If you're willing to deal with "mailing" snakes, you could be able to sell your babies all over the country. Having said that, one thing to remember is that if you do breed, you're going to have to provide for possibley LOTS of baby snakes, that may not always be real cooperating as far as feeding and such. It's one thing to have a pair, but to suddenly go from two to 20 or 30( garters can have VERY big litters sometimes) is sometimes a bit too much for people and something you really need to consider before breeding.
Roy