Really depends on the model. B2;B3;B4 or B5 and which forks it has.
Are you able to post pics or provide more details?
B3 & B4 models seem to be more common with some being sold under different brand names.
Mercedes sold the B4 under it's name with F4 forks, last one sold on ebay in July for £450. It was petty much all original with disc brakes etc.
Where are you based?