I would say its worth putting them on Ebay. Speaking from personal experience having spent way too much money on buying old airplane magazines there!
Put them up in batches, that way they sell easier. Make the batches small (5-6 magazines a batch). Ask for a reasonable sum - 50p, and say you'll ship for what it cost you.
Some batches will sell for 50 p, some for 5 pounds, a few even for 10. Depends on demand. (Market forces and all that) - I dont know what beer costs in the UK now but you should be to able to have a pint or two with the proceeds!
Worf