Was browsing around and noticed that The Encyclopedia of Judaism was costing 349.95. I knew that it was in one of the collections sold on the Logos website, and headed to Logos.com to see which collection it was in and the dynamic price.
I could purchase this Encyclopedia in one of three collections:
A. The Cultural Concepts Collection for 162.70
B. Judaica Reference Library (36 vols.) for 166.38
C. Judaica Research Library (220 vols.) for 343.80
In each case I would acquire several more volumes that are valuable to me.
These prices are my dynamic price. Your cost will probably be different based on what you own.