I was part-way through the book and I needed to sell some things on Gumtree. Normally I'd expect some low balling at first and then accept below the asking pric

I was part-way through the book and I needed to sell some things on Gumtree. Normally I'd expect some low balling at first and then accept below the asking price. However using what I'd read in the book, I got the asking price for all 4 items I sold!