Stick them on Ebay at no reserve, and if/when they don't sell recycle them.
The bottom has dropped out of the old mags market. Back in the Summer someone gave me a bound volume 1 of Classic Bike from the 1978/9 era and recalling how years back people would posted wanted ads for the early editions, I went on Ebay to see that there were a couple of these editions for sale, which didn't sell even at 10 quid start.
The Net is a more convenient way to look up stuff than looking through old mags.