what is your best haggle?

So far I have haggled on carpets, cars, washing machines,computers and wood to mention a few.
Always smile (dont look nervous)
with the washing machine I asked if it came with powder.
When I asked they said no but gave me free delivery which at the time was £19.99 and free conection again £19.99 and the took my old machine away. Again this was at the time they charged to do this.