Hey just stoppin buy checkin out the place : )... I got my 120 gallon acrylic and stand... kinda broke my bank so im working to buy some fishies for it

... Im just wondering if anyone has insight into protein skimmers here is a link to the one i am thinking of buying... it seems a little TOO cheap ya know?
Just seein' if anybody knows about this type of
skimmer or why its so cheap. Would this be good for a 120 Gallon berlin system saltwater tank?
http://cgi.ebay.com/New-150-Gallon-J...QQcmdZViewItem