@Chimley
People on here who don't think it's worth their time, what do they do with the stuff? Our charity shops permanently have 'not accepting donations for the time being' signs and this stuff takes up room. I try and give to charity but if they are accepting they pick through the bag and take about 10% of stuff and I have to cart the rest back to the car!
I advertise for two months on a free selling site. Usually FBMP or Preloved. For £5 minimum. If it doesn't sell for £5 in that time, I consider it's not something people really want so charity shops probably won't want it either.
If I do take a bag of things into the charity shop I don't make a special trip to do so, I do it eg if I'm going to the shop next door anyway. They don't get to pick through it, they're asked if they want it and if they say yes and take the bag I leave the shop. Same with those bags that come through the door asking for donations. If they're taking everything, they can have whatever I've got hanging around, if the bag says eg "only this or that" or "no bric-a-brac" then they get nothing.
Clothes I sell in bundles unless something really special that's worth £5 on its own even though it's 2nd hand. If unsold they usually go into a clothing bank.
I live in a town so collection isn't difficult for local people or even those in the surrounding towns. If it's expensive, ie over £100 and will fit in a box I have lying around, then I'll also offer to post, but only accept bank transfer.
Anything that doesn't sell is offered free to friends and family. I can't be bothered organising things with strangers and giving them my address and waiting around for them to maybe turn up, unless I'm getting at least £5 for it. If nobody I know wants it free, it'll be recycled or occasionally if it's not recyclable it'll go in the general rubbish bin for landfill. Most things have recyclable parts though so very little goes to landfill.
To those who think that makes me privileged, I'm really not. I've been totally broke before but it still isn't worth the hassle of selling stuff for £1. It's too stressful. The time I spend answering messages from fuckwits and CFs who mostly don't end up buying would be better spent throwing the stuff away and figuring out some other way to either obtain money or save myself expense.
Quite often you can bundle up all the stuff that hasn't sold and sell the lot for £5. I also put the items with price on my profile page, send a friend invite to the inquirer and invite them to check out my other items since they're coming to collect anyway. Quite often sell an extra thing that way.
It surprises me sometimes what sells and what doesn't.