Flat rate priority mail would be $3.85 plus $.45 for delivery confirmation. Total is $4.30. I would charge $4.30 for shipping. The fact is that I sold it for a certain price! I don't expect to be reimbursed (or make a profit) for packaging and taking it to the post office. I believe in the Paul Sax School of delivery. No unnecessary or hidden shipping charges. Gee, should I charge for a piece of tape, or gas to the post office?