$225 + s/h. I would have answered sooner but for some reason I didn't recieve an e-mail notifying my that someone had responded. Keep in mind that this skimmer needs a new impellar shaft for the pump.
I just put a brand new Euro Reef ES5-2 on my 65 gal and it works like a madman: would probably be perfect on a 55, too. has them for $198, and they unfortuneately just ended the free shipping special. Easiest thing in the world to adjust and has a small (9"x9") footprint. premium aq euro reef
my $.02