A caution must also be given for sell-through rates. These vary from 100% to below 50%. However, there are many factors which can affect this, from the size of the minimum acceptable bids, to whether the material has a large following or appeals only to a small niche, to minimum acceptable prices sellers may set (some sellers have been known to have unrealistic expectations, despite an auction house's best advice). Once again we caution against reading too much into certain figures.

All of these fascinating charts are now available to AE members (and there is no charge to be a member). If you aren't currently a member, you can sign up for a free membership (it takes less than a minute). Click here to sign up now. You will receive access to seven charts, covering median and average prices, sell-through rates and sales above and below estimates, by month and by auction house, both in U.S. dollars and in original currencies. You will also have access to the AE 500 list of the 500 highest auction prices for 2005, plus charts from 2004 as well. If you are currently a member, log in to view these charts; if not, sign up and log in. Once logged in, you can view these results by clicking "2005 Auction Results" on the menu to the left (under Free Services). It is a most fascinating look at the world of book auctions, important for book buyers and sellers alike. Click here now for your free membership.