I bought several old door knobs from Sage Consignment. If you have never been to Sage Consignment you should try to go. They have the neatest things!
I wasn't sure at first what to do with them...then I decided to make garden stakes with them. I bought wooden dowels and a cheap bag of beads. I strung the beads on floral wire and wrapped the dowels and then glued on the door knob...and whalah!