Where are you from? Does your price change according to volume of the transaction?
Can you give me an example price for 60 BTC say if we were having a deal right now? (so I can compare with market value and decide if it worth meeting you for me).
We take the price from the market. You can choose the place like Poloniex, BTC-e, xbtce.com = their price +5%. For 60 BTC we can give 4,7%.