Grateful..? What else? Probably some disbelief and shock if it was just random and unexpected, of course mixed with glee (I'd probably drop my jaw to the floor and literally jump up and down for a second or two, depending on what it was, while admittedly laughing and/or squealing in delight). I mean, it's a crazily happy enough feeling when you order durgz and they finally show up... you talking just randomly, unexpected? Fuck, grateful of course; gotta reiterate that. Maybe a bit suspicious if it was totally unexpected, though; nigga could be sending some ricin or some shit.