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					Originally Posted by  tompe
					 
				 
				How do you know that? Shops selling both new and used books sells more new books and have trouble selling used books. I know a lot of people that would never buy a used book. I do not know anybody that will not buy a new book. 
			
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 How much "product" had been created in the last 50-100 years? how much still exists? how much of that reached the marketplace? 
Then how much new "product" is sold inany particular year?
Unless total sales is on a long-term power growth curve, most likely the amoutn of product available used should exceed the amount new. There's just much more of it...