I think Adam has it about covered, they are worth a quid or so each, some issues that have Hammer covers may well go in to the £5-10 zone, bit more on a good day. Ari may pay more for one with a poster of Yutte Stensgaard in, as I would with any Caroline Munro articles/posters in, and like-wise for other collectors of specific films or Stars
On the Whole more of an interesting history of the time... I tried to sell some of mine a few years back, the only one that went for over a fiver was the Star Wars issue, so I gave up.. Still have them all. You may find someone will give you a price for the job lot if you just want to move them on due to needing the space.