I have my used AquaC EV-180 Skimmer for sale. The skimmer comes list for $385 on marinedepot with a Rio 3100. I have a Rio+ 3100 with the auto waste collector cup ($90). It is setup for ozone (plugged) and works very well.. It can be internal or external to the sump. I will also throw in an adjustable acrylic stand ($45) with it.

So I have:

Skimmer with pump - $385
Auto Waste Collector - $90
Acrylic Stand - $45

So I have about $530 minus shipping in it. I am looking to get $275 OBO. Please email me my99taws6(at)yahoo.com for faster response.