We had a yard sale once and my wife was a pretty good manager of it. She used to be a buyer and had a booth at a nearby flea market, so she had experience.
We did pretty good, but down toward the evening I could see that quite a few things weren't going to sell for the price we had marked on them. I was about to be faced with having to dispose of a lot of stuff we had no further use for.
I started asking people if they were interested in any of that stuff if I would work with them on the price. The look on their faces was priceless when I told them I would pay them $1 if they would take a certain amount of items. Most of them decided to take even more with a deal like that.
I wound up with very few things to dispose of afterwards.