Several times on these forums there has been mention of the old, original Combat & Survival magazines published from 1987 to 1989. These were the original series published in 100 weekly parts by Marshal Cavendish, not the later monthly magazines. Later these 100 small sections which formed the manual were re-packaged into 28 hardback volumes by H.S. Stutman (I think primarily for sale in the US). Full sets of these are quite rare.
I recently came by three full (28-volume) sets of the hardbacks in a book sale. They are all in very good condition. I am keeping one set for myself but am willing to let the other two sets go to good homes.
If you are not familiar with this series, they are a mine of information. As the title suggests the main topics fall into either combat or survival, sometimes both. While I expect that how to fire a milan anti-tank missile is of limited interest (well it is to me :-D ), I suspect many of the survival topics will be of great interest to the outdoorsman or bushcrafter. All the bases are covered - fire, water, food, shelter, as well as different environments (arctic, desert, jungle). There are sections on flint knapping, trapping, fishing, preparing game, preserving food, wild plant foods, etc. There are some nifty techniques and methods in here I've not seen in other places.
Also covered, knots, ropework, river crossings, first aid, environmental hazards (cold injuries, heat, parasites, insects etc). There are sections on tracking, albeit from a military viewpoint.
Of interest to some maybe are descriptions of escape and evasion kit and methodologies. The camouflage and concealment, particularly the sniper stuff (including RM sniper course) may be of interest to stalkers, wildlife watchers or even paintballers.
In addition, there is very good series of articles on fitness training. The training programme of units such as the Royal Marines and the Paras is detailed in quite some depth. Many other specialist units are also examined.
Many bushcrafters also seem to be interested in self-defence - I think it's a general desire to look after oneself - so it may be worth pointing out there is an extensive and quite comprehensive, well-illustrated series of articles on unarmed combat, covering defence against single, multiple and armed attackers. Some of it is quite brutal and military-orientated but even if you've done some martial arts already, there are some interesting points here.
Finally, if you are actually interested in military equipment and tactics, particularly small arms and infantry, there is enough in here to keep you entertained for many a rainy evening.
All in all, this is a treasure trove of info that you will not find in one source elsewhere. As I say it's 28 volumes and a total of 1700 pages, including a full index.
I will consider offers of £50 or more (that's less than £2 per book). Please PM me if you are interested or would like any more information. :-D