I imagine everyone who is looking for a toolkit, on ebay and elsewhere, will probably have seen it; and all will have been hoping that no-one else will have so that the price didn't get popped up to the nearly £200 the last one went for. All it needs is no-one to post it on an open forum and ....ooooops! Too late.
In the kit on ebay are only four tools that could be correct for an M20, the adjustable spanner seems to be 6" and should be 4".
This is a trick that seems to work over and over again.
This is what should be in a BSA tool kit.
http://wdbsa.nl/tools.htm
Henk
email (option): ahum@quicknet.nl
Rob
I have the feeling that the drawing isn't very accurate when you compare some of the tools and I seem to remember reading about these adjustable spanners being 4". Correct me if I am wrong, I can handle that
Henk
email (option): ahum@quicknet.nl
I never really thought about it and I would guess this is not the only place it was posted. I only mentioned it as I was not interested myself, also people are always posting ebay bits and bikes on here......
No problem for me mate, as you say it happens all the time on all sorts of forums. But I know it does sometimes get commented on by 'the hopefuls' who really wanted no-one else to spot that badly listed Brough, currently under offer of 0.75p and a packet of winegums! 
At the time of writing (11mins to go) it's on £127. Over the last few months I've picked up most of these items individually on my local fleamarket, total so far £13.50. Not got the adjuster or the oil can yet. Still looking.