Of all the Buells, the older tube frame models are the ones that seem to have some collector value. Few were made and quite a few were hacked up for chopper projects. The S3 is a cool bike...but HD is the ONLY source of parts, which is spotty at best. The new Buell company (EBR) makes some race parts for XBs and 1125s, but they do not have OEM replacement parts.