Value of a Brandt Desk?

I have an old desk that came with my home when I purchased it. It has a Brandt label and numbers stamped on the underside. It looks as though it may have had glass or wood panels on the top sides that are no longer there. Otherwise it's in great shape. I would like to sell it because I have no real use for it, but have no clue on what it may be worth. Any advice would be great!