I use the USPS shipping chart to estimate your shipping costs. I charge you the same amount the PO charges me to ship it; no handling fees etc. If you are combining an order, it is better to ask me for an invoice before you pay. If you feel you have been overcharged, please e-mail me; I will be glad to refund any money that was over-charged. If you have any suggestions for my store, items you would like to see that I don't carry, let me know.