On most characters I store 5-10 large inspirations in the Auction House. When posting items for sale, the item I'm selling will be at the bottom of the Stored Item list. I'll enter the listing price, click the post button, get the confirmation dialog for the AH fee (this only seems to happen selling pricey items), click OK, then discover that the item I wanted to list is still in my inventory and I'd just listed a large inspiration for $15,000,000 and paid a $1,500,000 fee. This has happened to me so often that I'm on the lookout for it. No matter how careful I am that I'm clicking on the correct item, it seems to happen about 1 of every 10 transactions over the confirmation limit.