When I went to sell a new hoe the auction window told me that the lowest price for a new hoe was 1 currant... Thinking this odd I went and looked at the listings. I found two hoes at 50 currants each, so this appears to be a bug.
Edit: Same thing with a new fancy pick, it says the lowest price is 4 currants... Yet the listings show the lowest price to be 899. I'm thinking it's referring to the price per unit of wear, but instead of saying per unit of wear it says per item.