Depending on how big the trade is I always put in maybe 3 extras, put in as many as 6. Maybe a glass as well. Depends on what and whom I suppose, but I've sent extras, received none in return, and not even a notification he received my package, had to track it myself to see delivery confirmed. Needless to say i wouldn't send him shit in the future. A nice little I rec the box and thanks would have been nice.