Martin, The KB-1 in new/good condition goes for $75-100 on eham/ebay etc. 73 Randy K9OR ----------------------------- ...the KB-1 is effectively NIB though no paperwork if there was any. Would swap the filter for a YK-88C-1 filter, not sure about the KB-1. Can anybody indicate what it might be worth? 73's Martin, HS0ZED