Catalogue the collection before its history becomes difficult to reconstruct

For each item, keep a record of identification, serial number, acquisition date, known provenance, condition, replaced parts, service work and accessories.

Add general photographs and details of identifying components. Store documents and files in a structure that will still make sense years later.

A catalogue is not only for resale; it supports maintenance, insurance, inventory and historical research.

Do not rely entirely on memory, especially when several examples from the same series look similar.