Is the bracket on one side and a matching hole on the other end where another bracket would have been ?? If so I believe it may have had a back at one time. In the pic that shows the bracket, if you look at the pic you can see a faint line where it would have sat on the top and a bracket on each side would have held it in place. The sideboard would be against a wall and the back was only a decorative piece a few inches tall so that would have been all it needed !! $200. is a fair price for the sideboard and about market value for one in good condition. Yours has a waterfall front which adds to its appeal as I see it and all the original pulls,, another plus !!. Still looking at the top,,,almost looks like satinwood but not sure !! Will let a few of the others give their 2 cents worth !! I think you made an excellent buy !!