The prices reflect major auction houses rather than internet prices, don't they? Perhaps the internet is having a downward effect on prices of all collectibles, not just glass.
They are auction hammer prices, but I don't think eBay is having a downward effect on prices as such, but it might be accelerating the trends and fashions in glass collecting. Well, the lower priced items anyway :wink:
But due to rapidly fluctuating trends, the prices in Miller's would only be effective from the day the book was compiled. As Tigerchips mentions; they're excellent guides, but the prices should be treated with caution.
:idea: However, what I can't understand is why Miller's or Dorling Kindersley haven't published a price guide on the web that is updated to suit these trends? Simple enough to register ownership of the book and the ability to download new guides, say every quarter, for example...
Also another way to make money, of course, by charging for each download... but would people then buy the next print edition — ah, there's the rub...