I looked on the 'Bay for a brief eternity and never saw one at a price/condition/return policy point that made sense. I finally did the right thing and bought one new from the factory. Best darkroom decision ever. There is no way to overestimate the value of the time saved in the darkroom. Many folks will spend the value of an Intellifaucet on lattes in a year without blinking. Nobody would think you were crazy if you spent $4000 on a motor for a bass boat so you should not feel funny about dropping $1200 on a darkroom tool that will last as long as you live. If you do not have the cash, this type of item is a good choice for a credit card expenditure because it is a long term durable item and you will not be suffering any temptation to buy a second one anytime soon!
Just two cents from the voice of experience.