As a proponent of a library history museum, my adrenalin got going pretty good when I came across an historic book wagon for sale on eBay. The seller is offering it for a "Buy it now" price of $15,000, but is willing to consider a lesser offer. If I only had a spare $15,000 and space to store it. According to the seller on eBay, the book wagon dates to the 1920s and was on display in Vancouver, British Columbia for the 1986 World Expo. Mary L. Titcomb, the Librarian of the Washington County Free Library, sent out the first book wagon in the United States in Hagerstown, Maryland in April, 1905. Titcomb designed the book wagon which had space for 200 books on the outside of the wagon and storage space for more books on the inside. I have a "Tribute to the Bookmobile" on the Library History Buff website.
Addendum: On January 16 the book wagon was relisted for a period of up to 29 days, so you may still have time to purchase this great item and preserve a piece of library history.