0.500 in. Hex to 0.375 in. Hex Adapter

I bought 2 tiny hex adapter nuts that could not be found in regular hardware stores--at $10 each. I know AndyMark must keep a large inventory of little-used items and so was not amazed at the high price for these two items. But I was astonished to have to pay &10 for shipping these 2 tiny items by US mail. That seems like a rip off price to me.