I have no certificate or anything but I do have the Lima class 20 which used to run around the layout in beatties shop window in Blackpool, bought for a tenner in the shop- no box, broken buffers and drive shaft all of which have been replaced (although buffers wrong colour! For this little piece of history I would listen to offers over £200!!
Anyway good luck Bachmann with this venture I look forward to the chain opening near me soon.