In which of the following cases would a seller be least likely to use an auction to determine the price of an item?

In which of the following cases would a seller be least likely to use an auction to determine the price of an item?

The item is unique and the seller is not certain what it is worth.

Buyers' valuations of the item are interdependent.

The seller is aware of each buyer's valuation of the item.

The seller overpaid for the item initially and is trying to recover some of his losses.