I would not go to the local sale barn. There are all kinds of diseases there to bring to your place and spread to your animals. Look on the internet and find a local breeder. You might have to travel a little to get a good quality, healthy one.
I have Shetland sheep. I'm up in NW Arkansas, Eureka Springs to be exact. All I have for sale at this time is a ram that was born last spring. He's black with white spots here and there. Email me privately at terryrune @ gmail.com if you want more info.