The is the 4th version of 1st edition prices by Russell and Tartarus Press I have bought over the last 10 years or so!!
The last version 2008/9 was an excellent book and well worth the wait over the previous version, but this one......!!
Although there are a handful of extra authors included there are so many errors carried over from the previous issue (08/09) that I feel it hasn't been researched properly. Also, there are so many authors where prices haven't changed at all which is strange when you think that over 3 years many authors have experienced value increases at book auctioneers such as Bloomsbury or Dominic Winters!!
You get the feel that this edition has not been thoroughly researched and perhaps there has been a reliance on 'others' to review authors on behalf of those compiling the book.
I would strongly suggest holding on to your money, stick with the better 2008/9 edition and not bother with this one!!
Oh! and I am both a book collector and dealer for over 15 years so know what I am looking for!