Ok, I am going to chime in here and say that this is going to be a good thing for anyone looking to sell a drum or for those looking to buy a drum but don't have knowledge of that drum. I have been drumming for 38 years and in the last couple of years I have gone in to business for myself and repair, restore and sell vintage drums. Occasionaly I have a drum come across my work bench that just stumps me, this happened most recently about two weeks ago when I had a drum in mny shop that I had never seen before and had absolutely no idea what to tell my client what the drum might be worth. My hope would be that the book would cover drums prior to 1900 as well since I have a lot of dealings with drums much older than that in my business.
The ability to look up what a four piece Ludwig or Slingerland kit went for recently, whether it was sold on Ebay, Craigslist, Auction House, Drum Show etc. is a good thing. Even though most tend to think that Ebay tends to skew the market and the fees are high it helps someone like me determine what I can charge for the kit or snare I just picked up at a tag sale for $25.00. If it has the effect of bringing vintage drums into the spotlight and driving up the prices of some of the drums I am trying to sell then I don't see that as a bad thing either. even if that were to happen then I don't see the prices on common drums like Supraphonics, Acrolites, Dynaconics etc. being driven through the roof because, while they are good sounding drums, they were also produced in large quantities and aren't considered to be "Rare" drums. As for the the more expensive and rare drums like the 20's era Black Beauty, Leedy Elite, Slingerland Black Beauty and others, they are already in a price range that will exclude most of the average "Players" from purchasing them because a single drum can go for as much or more than an entire high end kit.
It sounds like this is going to be set up as a guide and not the end all be all of blue book pricing and can only serve to help and not hurt. I would be happy to report prices of sales on some of the stuff that I have moved recently if it will help.