After almost 2 years of excellent service, I've sold my almost mint condition 1998 TBS and replaced it with a mint condition 2005 BMW 1200GS, (non-abs/linked/power brakes), with full expanding luggage.
My TBS suffered no depreciation under my ownership.
In an ideal world, I would have liked to keep the TBS, but I don't think 4 bikes would be tolerated by 'she who must be obeyed' LOL.
My Thuxton is a keeper.