Vesta's plateskirt

High alchemy turns Vesta's plateskirt into 300,000 gp. Buying one at 8,000,000 gp (its guide price, as it has not traded today) and casting with a nature rune at 138 gp costs 8,000,138 gp. That is a loss of 7,700,138 gp per cast at its guide price, so it is not worth alching for profit right now.