Whats in there now?
Is there a performance reason for impeller change or is it damaged?
A used impeller, while fairly inexpensive, may cost you more in set-up than a new one.
Looking for a 'B' impeller? You would be unhappy with a 'AA' Berk if you have a 'B' now. My 'AA' seen one too many rocks...but might be able to turn it to an 'A' (not for sale, sorry)
Tom @ JBP has a few used ones.
Good luck on the hunt.
Dan'l
