I think whether to provide manuals - and to what extent - is the sort of thing that every dealership, customer, and manufacturer has to decide for themselves. Hopefully all of the service providers ultimately decide based on what the customer wants. But that isn't going to happen, so what I really hope for is that some of the people who make that sort of decision read these posts. I know I would.....
In the US, the norm is to provide an OPERATOR's manual with every new machine and as many used ones as possible. About the first third of the manual seems to be various legal forms of saying "Don't do this!" Probably necessary, sometimes even helpful, and might well be the reason why manufacturers tend to freely distribute an operator's manual in the first place.
In the US, the more detailed TECHNICAL, SHOP, & PARTS manuals are normally not automatically included with a tractor sale, but can often be ordered just like any spare parts. Prices are surprisingly stiff for something that a manufacturer has to have available to provide to their own dealer's service departments. It's not unusual for a set to be a few hundred bucks - a pretty stiff cost for reproducing something that already exists.
My own philosophy is to include hard copies of the technical and parts manuals when I'm negotiating the price on a new machine or implement. I tend to be rather firm about that. But it's just all part of the negotiations when buying any large ticket item. Just another thing to agree on & no different than things like price, payment, interest, add-ons, and warranty. These things are all very negotiable before a contract is signed.
Hmm.... I don't have to tell friends on a tractor forum about the art of negotiations!
But I can't help myself from saying that from my own buyers viewpoint a handy thing is to find out which of the negotiable items will cost the dealership real money, versus which items don't cost them much. Even though their potential profit on the latter group is much higher, these low cost add-ons are often the easiest things they will be willing to include to make a sale. After that it's just the fun of bargaining.
rScotty