Folks, if you've recently upgraded or renewed your annual club membership but it's still not active, please reach out to the BOD or a moderator. The PayPal system has a slight bug which it doesn't allow it to activate the account on it's own.
If your just using it to dose 2 part it will last a long time. Water changes are what wear it out. In 2 years mine has changed 1,500 gallons of saltwater that alot of wear and tear.
I think I pay $190 for my used one shipped. I would find out if they used it for auto water changes. It puts a lot of wear on them. Personally for another $85 I'd buy a new one.