In reply to Papillon:
I agree with you. And who's to say that donating to a charity shop is particularly better? They might put it on at a bargain price and someone will pick it up and sell it on at profit. I mean I've had two very good SLRs out of charity shops, one at £20, one at £16, I could easily double my money on either of them (in fact I am keeping one and have given one to my Dad).
I fully understand the annoyance of Freecycle chancers and the notion of wanting something to go to a good home of course.
Maybe just put stuff up on your own Facebook and ask if friends of friends want it? I shifted a guitar effects pedal this way, better than gumtree or whatever and I knew it was going to someone who would use it properly, Got £30 too (second hand value was maybe £40 but it would be hard to actually GET the £40 with all the hassle of people making offers, and having to post it and so on).