I run a web site for a rare car called the 1967 Ghia 450ss.
Of the original 60 cars made, the owners have found about 21 remaining cars and increasing. In the files section of a typical Yahoo Group web site, you have the ability of creating directories for each of the cars. Each car directory contains a simple Word document form that details the particulars about each car, unique features and its present location but not the owner’s name. In each of the directories we also allow the owners to upload pictures of their car. As the moderator of the web site, I keep a private directory of the owner’s names, addresses, phone numbers etc.
To access this section of the site, you unfortunately will have to register.
Over the last twelve months we have gone from three cars to the present twenty-one.
This type of system could easily support a few hundred cars. Unlike my Ghia registry which has a flat directory (cars 4001 to cars 4060), a steam directory could be developed with a simple nested directory structure: Year (189? Through 192?) – Manufacture (Locomobile, Stanley, White, Brooks, Doble, Misc.) – Serial Number. Making the owners participate in the population of the registry has made it really easy for me as the moderator.