Several members have asked me about the Cryocooler. @Romeo_Espana, @william_petefish
Older Model ~$300
Or a new in box one ~1,740
http://www.ebay.com/itm/NEW-850S2A2RV20-Superfilter-II-A-Omni-Vrble-Gain-Bypass-Superconductor-w-Cryo-/381237619523?pt=LH_DefaultDomain_0&hash=item58c3886b43