I just got me one of these in good working order from the local university surplus store for $5.
I also got a heated stirplate for $5. Since I was a moron, I didn't take anything I could use to test whether or not these actually still stirred. So, I heard whirring and felt heat so I though I was in business, but the heated one doesn't stir. Oh well, $10 total and I may be able to fix the second one...I think I'll live.