is the the -- or the rs model?
the pump that the rs skimmer uses is a gen-x 4100 which i've seen selling for 53.99.
the -- model uses a eheim 1262 which i've seen for around 139.99
i've seen a new rs 180 advertised for 448.00
the -- 180, i've seen listed at over a thousand dollars.
btw- you'll have to get the "euro-reef modified" pumps, which might be a few dollars more.