So it turns out that in a couple of cases where I have recently bought a classic car and classic motorcyle sellers have removed certain items and then tried to sell them seperately at a later date. Nothing illegal but very annoying especially in the case of the car where the seller specifically said he had lost the owners manual/warranty book only for it to re-appear on ebay for $150. When I contacted him he said "oh I just found it"

Still he wanted $100 so I had no choice but to pay if I wanted the docs re-united.
Likewise the same thing has just happened to a friend with a 911 took kit and air compressor. Kits appeared on ebay days later and owner wanted $450. Seems like a trend going on here.
IMHO this is a really low form of behaviour (close to extortion) and the next collector car I buy I am going to stipulate in the sale contract that I have sole rights to any paperwork/tools the owner "finds" at a later date matching the car VIN.
I am ok with manuals and tools truly missing but not if a crooked owner is just trying to make extra bucks. It is also not right for the correct tools/papers to be deliberatly seperated with the car IMHO. Its bad karma.