I am re-configuring my filtration system on my newer pond, so will be selling two of my three Blue Eco RDF's go (I'm keeping the third one I have). Just bought them this spring new for more than $3000, will let them go for $2000 each plus shipping cost to you (unless you want to pick up in Illinois or arrange to meet me somewhere in between).
These are the newest generation of the Blue Eco RDF.
Both have the quartz sleeve and working ballasts for UV light too. Unfortunately I only have one working UV bulb at this time (I accidently broke the other!), so whoever is first to speak for the good UV bulb for an extra $25 gets it.
Please PM me with questions...thanks!