L.F.
Hi, You don't say where you live, but there are many dog parks in the area. They are free and the dogs have a great time. Aussies are very social and would probably make lots of friends the first time out. If you do decide to find her a new home, please go the Aussie Rescue route. I wouldn't use Craigslist to find a home for a pet. Just a bit risky, IMHO.
Good Luck, Nana