At an auction, all it takes is two interested bidders. But yes, there are collectors looking for these old books, because each one was a little different. I have a number of others, including a "Standard of Excellence" from the 1880's. That was before they called it the Standard of Perfection. I believe I could have done better selling that 1923 editionf on e-bay and donating the proceeds, but this was a whole lot less time consuming and less trouble.