@Anordinarymum
How can a charity shop be picky when you leave the bags of stuff outside?
You really shouldn't do that.
They might have limited storage space and also know what they can sell and what they can't. If you have stuff nobody wants why should the charity shop be lumbered with the task of disposing of your stuff.
We have recently had a mega cull of books. Literally hundreds of books we identified as ones we no longer wanted.
@Clutterbusting There are apps you can download where they will buy stuff. I got two who specialised in books. They both worked off barcodes and ISBNs and in truth they rejected about 90% but I did manage to sell about 150 books to them and made about £100. However I have just retired so have more free time. If I was still working I don't think I could have spared the time to do all that.
Most of the rest of the books (about 20 carrier bags full) were shared between local charity shops. However I always rang first to see if they were taking books. Some didn't, some only did on certain days when they had space, some would take paperbacks but not hardbacks, some had a limit of 2 bags.
I must admit I ended5up taking several bags of books to the tip. Something I would never have believed I was capable of until I realised that actually there are things nobody really wants. Out of date travel guided. Old celebrity chef books...
BTW skips are very expensive