What BradS said. KEH was the first benchmark I thought of also. Just checked and FM2n black bodies in EX shape are $172 while a EX 50 1.4 AIS is, interstingly $172 also. A 35 f2 AIS in EX is $235
So that is a total of $751 and of course that is with a 3 month warranty and exchange provision.
KEH would probably give you no more than .6X those prices for EX grade equipment but of course you would have to check with them for an answer to that.
They are quite strict on their grading system I might add.