I just received my second lot of 6 rotary blades from the US. It cost me 3.96Us to send it to me.I am happy to pay that since it was registered mail and arrived a week after ordering them. Now I have 10 replacement blades since I sent 2 to my daughter and it cost me $4 Australian to send it from Laidley to Brisbane. You are right though. If I had put them side by side in the bag it would have only cost 2.50 which is normal flat rate. so if you do not mind that the shops separate the bundles into a flatter package, the cost will be cheaper. so please ask the shops to split them for convenient mail delivery.