The floor price for UPS or Fedex is usually in the $8-9 dollar range for lower 48 states. Actual shipping cost is exactly that. If shipping and handling, technically you need a cardboard box with a min pound ratting, you can not use a $.97 walmart box. I sell on gunbroker and just post a fixed shipping price. Its usually more than actual shipping by a few dollars (not always), its known upfront. Its easiest that way, reguarless if its free shipping or overpriced shipping the buyer knows exactly what to bid for total cost and should not matter. Actual Shipping cost should be actual shipping cost though. Flat rate envelopes are not acceptable for ammo shipments. I always avoid auctions if shipping cost is unknown. I'm sure there are a lot of problems on handgun sales, even if it says "actual shipping" I don't think people realize it has to go UPS or FedEx overnight and may cost $40 or more.