Craigslist in Portland Oregon

There is a guy selling a RB67 lens that I never seen or heard of before. A 500mm f8 lens? Really?! Holy cow, what do you do with something that large? I goolge and the lens goes for $1600-$1800.

http://portland.craigslist.org/mlt/pho/1154489379.html

Robert
Read somewhere that the lens weighs in at around 10lbs. Yikes!!

Jorge