如题，比如我想在 https://docs.google.com/a/engine.co/spreadsheet/ccc?key=0ApGPLGUd5ZCzdHFxbnhHQjBDSDVKamY5UHlWdkNMNWc&usp=sharing#gid=0
买MasterCoin，要怎样操作？不会是我联系卖家先打给他btc，然后他打给我MasterCoin吧