Shows photo of nice looking F-1X along with an SF-2. Very reasonable price for the former.
 
Those looking for an SF-2 might want to ask if the SF-2 is also available as he indicates he's changed his rig.  
 
http://tampa.craigslist.org/psc/msg/5319032879.html

I do believe that the SF-2 was sold a while back...  He had both on eBay and the SF-2 went with a Buy-It-Now.
 
http://www.ebay.com/itm/Alembic-SF-2-BASS-Superfilter-Used-/291595971206?hash=item43e4796a86%3Ag%3APdcAAOSwA4dWKFwn&nma=true&si=3J5arGZuvrh2nBzH8HtCwo3SsEM%253D&orig_cvip=true&rt=nc&_trksid=p2047675.l2557