Can you get your account verified by Listia? (You'll usually get more bids if you do.) You can do it from your "My Listia" page...on the left-hand side, at the bottom, under where it says, "account settings".
There may be a way to check the prices on-line at www.usps.com (I think that's the address), but you would have to know how much it weighs. Hope you are feeling better!