How much is a set of encyclopedias for?

If you would like to buy the new ones that are up-to-date, and current to this year off of the official website, expect to pay a little over $1000. However, if you are willing to pay for older versions, each year that it is older decreases its value by $150. On Amazon.com or other websites such as eBay, used encyclopedias can come even cheaper. A 2005 complete 22-volume used set costs around $250.00.