When selling antiques, you can usually obtain a higher price for those that have a provenance, which is information detailing the origin and history of the object.
For example, property owned by Jacqueline Kennedy Onassis and Princess Diana sold for much more than face value.
What kinds of products have value over and above a comparable product because of such information?
What kind of information makes products valuable? Consider both tangible (resale value) and intangible value (sentimental appeal).