AIBU to think that if you agree to buy something on a local Facebook selling site that when you go to collect the item to take the right amount?
Twice this has happened to me recently. Had a clear out and sold a few things online and when people arrived to pick up an item for £7 they produced a tenner and expected me to have the change.
Luckily both times after a bit of racking around & raiding of piggy banks I managed to get the change together but AIBU to think they should have taken the correct money given they knew the amount?