Wow - Free is a good price! Grab it or you might regret it!
For other vintage finds, don't dimiss your local charity stores like Goodwill or the Salvation Army, either. I have seen some amazing stuff in stores in NYC, LA, and New Orleans but I had no way of transporting anything.
Look for garage sales or flea market that are organized by local churches or schools, too.
Final tip - don't be shy at garage and yard sales; ask the people holding the sale if they have any old appliances to sell. They may have not wanted to haul them out of a basement or attic to include as part of the sale, so you never know!
Good luck with your hunt for Maytags!