I have used Swaptree a number of times without any problem. But on my last trade, my trading partner reported that she did not receive the book I sent. I was not worried since I had the Post Office receipt showing the date, time and place it was sent to. Still, it did not show up, and it was obviously lost or stolen from the mail. Swaptree did not accept this, and started harassing me about "book not sent", leading up to multiple e-mails to me, incessent threats, and now suspension of my account. This, after I sent them a copy of the PO receipt, proving I was not at fault. They will not retrun my e-mail questions, and I cannot get in touch with anyone who can resolve this for me. Their customer support SUCKS! I am an honest businessman, and strongly resent their implication that I am a thief or a crook. STAY AWAY from this site!