The sellers can be just as funny/optimistic both on freecycle and on facebook.
I was after some rubble and paving slabs to go under a shed base. Figured someone (or hopefully several) would have ordered a couple of tons and only needed a bag and a bit of it so I could collect a trailer full. Found loads of photos of dodgy walls and patios with “rubble, buyer to dismantle, must be gone by monday as the builders are arriving (and we obviously saved a few grand by saying it would be cleared for them)”.
Same applies to rotten sheds and corroded/smashed greenhouses.
There’s a line between getting rid of stuff you don’t need, and expecting someone to do your DIY for you.