I've just checked two of my favorite stores and they had everything you mentioned in stock. Of course, my location is Japan so these are Tokyo prices but take it fwiw.

67II & AE prism: $900-$1100
75/4.5: $150-$200
90/2.8: $180-$260
135M: $100-$200

All of the lenses are the newer version and the ones at the lower end of spectrum are in poorer condition.
Based on these prices the low end would be $1330 - The high end $1760.
The grip should be less than $100 (newer version).

So if I were shopping, $2000 would be my very top limit, and only if everything was completely pristine and I could inspect it first. But once again, that's me in Tokyo...