What are these worth?

[No Signals]

I've been asked by a bloke I know, who doesnt do eBay, to list some Mutt manuals for him. Anyone any idea of what should be a reasonable price for them to go at? I.e. are they worth not a lot and therefore not worth puttting a reserve or suitable start price on? Or the opposite? They all seem to be variations on TM 9-2320-218-10.1960, 1971(2 sight different), 1974 (something in German) and 1978. All in very good nick. Any guidance appreciated as these are totally outside my experience. cheers.