The Bostrom is a thing of beauty. I have just bought my second. The first one I sold 18 months ago and bought an MV F4 1000 - big mistake, I then swapped the MV for a 999r Fila Rep but I still had hankerings for the Bostrom so I have just got another one
Only 26 Bostroms were brought into the UK and no doubt some of them have been written off by now so it is a rare bike making them desirable which keeps values high.
More Bayliss bikes were made, I think 400 so not as desirable and there are many Baylis copies out there (its just a case of adding a few stickers wheras the Bostrom has a blue frame and wheels which makes it harder and more expensive to replicate)
The Baylis looks a bit dated to me because its based on the 2002 WSB bike wheras the Bostrom isnt based on anything (apart from his helmet)
Theres a Bostrom for sale in Moto Rapido at the moment and there was a Baylis at Ducati Glasgow and another at Pro Twins
Roachman