I sold 2 of my sewing machines that I hardly had used to help pay for the machine I wanted for quilting...I still had the original boxes, all the packing and even baggies all the accessories came in for both of them. In addition to the original boxes, I also put them in another box with extra packing...insured all and required signature confirmation...both sales went great! That being said, I have to agree that you just try to research everything you can, and hope that all goes well...I certainly try to treat people the way I want them to treat me...wish all were like that...
Good luck to you,
Kif