Check out local thrift shops or put an ad in quilt store or local paper asking if anyone has a machine they are willing to part with. You may not get your dream machine, but you could get an old machine that is still in good working order for a minimal amount of money. Lots of people have old machines in their closets that they are more than happy to get rid of. Check out garage sales also. As long as it sews a straight seam you are all set.