The rust doesn’t look all that bad.  This might be a decent price for it.

“This is a 1957 jeep fc 150. its all original but has some things missing and a little rust. things missing that i noticed are the distributar and speedometer. the passenger door is damage but could be fixed by a body guy, some rust but will be surface only and could all be taken off when sandblasted, nothing that bad, i would suggest removing the bed and cab to go through it, these trucks are very easy to pull apart. its got the original engine and was running about ten years ago. most of the parts are willy’s jeep and can be bought still through local dealers. the seats are there and there’s a few extra heads in the bed. i noticed a bunch of spare parts in the bed, i will get an inventory soon. call me if your interested, ill try to answer any questions, erik, 916-218-9187, $ is negotiable and i will deliver it!!…”

http://sacramento.craigslist.org/cto/992178245.html