I dont want to step on Daves toes, but i have one aswell for sale...so i will offer it for 200.00 ONLY if you buy his first...so get a buddy to go in with you on it.
Other than that it is 375.00 until he sells his.
His thread is here...
http://216.187.96.54/vbulletin/showthread.php?t=31658
(daves and this one) ARE a better and more efficient pump all around than the reeflo hammerheads.
They ARE fitted with saltwater seals, and THEY DO have a stronger housing than even the newer models of hammerheads.
They ARE also more energy efficient than the hammerhead in long term running costs.
Has been run for 1 year.