I can tell you right off the bat from my own personal in-depth testing with the 645D (with most all the lenses you listed and multiple samples of each)...that there is tremendous variation in performance between samples of the same lens. So much so, I wouldn't have guessed I was dealing was the same lens in some cases. The FA 120 f4 macro was the exception, where multiple samples of this incredibly fine performer were very consistent. This is after testing at close, mid-distance and infinity, tripod mounted, controlled conditions etc. All lenses best performance using the 645D Af fine tune was first determined prior to testing. It seems that lenses that were acceptable QC standards for releases by Pentax back in the film days, may not be acceptable for performance on the 645D. That's what appears to be occurring based on my observations/testing.
The point I am trying to make is any deal or arrangement to purchase such a system containing these FA lenses, would for me be predicated on trying out each lens first, determine best AF fine tune setting and then note how the lens performs. Once complete, you'll have a much better handle on what you are giving up and what you are gaining in any proposed trade. I cannot speak 1st hand what I would suggest for the person obtaining the Hassy system/lenses in such a proposed trade..so my comments basically pertain the Pentax FA/645D side of things.
I would also agree with the above assesment...the total value of the FA lenses listed, assuming they are close to LN condition, would be around $9200.00-$10,0000 . Any other condition of the lenses could decrease or slightly increase this estimate, in my view.