Not my 68 FB, but I looked at it. WAY overpriced
Here's a 68 Fastback I went and looked at back in march or april, I think he was asking $4500 then. It's about five miles past bumfuck nowhere, outside of the town of Mendocino so at least it's a nice drive... I hope someone can get some benefit from this. You'll need a trailer.
http://sfbay.craigslist.org/nby/cto/5227909213.html
The bad: it's going to need more hours of bodywork for the entire front clip, may as well replace with all fiberglas. Will need panel between rear window and trunk replaced. I can't remember if the trunk pan needs replaced. Some flooring sheetmetal needs replaced. I consider the 340 nothing more than a core, the heads were off for a while and it's been parked out by the coast for who knows how long. If I remember right, the driver's door striker is either missing, or the sheetmetal is all torn to hell and gone.
The good: He has a TON of new suspension parts. The glass was good, and so was the dash. Also, I can't remember if I was impressed with the condition of the trunk trim.
If I had the money, I'd just offer to buy the rear end, MAYBE driveshaft, trans, pedal assy, etc to convert to 4 speed. I wouldn't even bother with the front end suspension as it's about half disassembled.
This is a parts car, I wouldn't pay more than $3000 for it.