I got some wonderful grains from a seller on Amazon. Be sure to read the reviews. He got very good reviews and it turns out they were well-deserved. The grains I received were quite vigorous, and he included shipping in the price so they were reasonable--I think it cost me all of $6 and we have had a steady and constant supply of kefir since. Craig's list local listing for kefir grains were $15 and above.
I have 4 different probiotics, water kefir, milk kefir, kombucha and jun scobies. If you order $30 it is free shipping and if you get all 4 it is $34 total. My website is https://sites.google.com/site/desertoasisbuckeye/shopnow where you can order online or you could mail a check. Let me know if you want to order some. You can pick up in Buckeye or I can mail your order.