They do come up now and again but as usual it comes down to price.
I was very lucky to purchase my Ed White about 2 weeks ago, it all original, has everything the one in the link has bar the all important papers, saying that mine has extract of archives, service history, thick folder of info from previous owner, Simon Freese service history and end links that are considered more rare, mine cost less than 30% of the one in the link, as I said I was very lucky.