jawwad,
I have this one for $30.00. It's never been used but there is a part in the back of it that is broken, I can fix it with out a problem. The break is up high in the back where it wouldn't effect the way it operates.
I've got a brand new cpr 800gph ($75) and a used cpr 600 gallons ($45). Also have 1 aqua lifter pump that I will include. email me if interested [email protected]