As has been said before, anyone can write a "value". It is up to the buyer to know what he is looking for in a stamp.
There are a couple of big sellers on
ebay that only show scans with a value listed. I don't remember ever seeing any other information about the stamp, but of course there are the disclaimers!

I try to avoid even looking at these sellers' items even though they start at .01 because they always explode way out of my price range.
I believe that repairs, regumming, thins, tears should be mentioned on high value stamps! I would like to assume that the seller is relatively honest.

741opamp: I'm glad this all worked out for you. I do pity the next buyer!