Good Australian Shepherds?

I haven't been on in a long time and so i'm starting all over. I want my Kennel to be a Australian Shepherd only kennel. I just need some help starting off. Does anyone have or know of anyone that would have a good Aussie i can begin with. I want to do events such as agility of herding with the pup. So if you could either message me or reply that would be great. I also dont have a ton of money so a reasonable price would be great! Thanks again.