Chap calls me out to his house. He had sold me a couple of boxes of books a while ago, for which I paid £100. It should have been about £70 but he gave me a sob story about decorating the house before his wife got out of hospital.
So I went in again, these are now the tail end of his collection, and not particularly special. I offered him £50 (and that was probably generous).
"Oh dear" he said "I thought you always paid £100 for books, and I need a hundred to pay for some more decorating, so can you make it £100 please".
I resisted the temptation!