I'm going trombone shopping next week with a friend, and we were talking about how much (if any) discount it's polite to ask for off a new instrument. And whether it's appropriate to ask for a mouthpiece to be thrown into the deal as well. The last thing we want to do is insult the sellers (for example if they can't afford to give a discount - I have no idea how much profit is added to an instrument after cost price), but also I don't want my friend to waste money by just paying the full price if it's not needed. How much discount would you ask for (and how much would you actually expect to get) off an instrument costing £2,000? Sorry if this is a silly question but it's a lot of money to spend, so we need to be sure we know what we're doing!