Bathroom Glass Shelf Mounting Options

I've got a pedestal sink in a full bath which leaves absolutely no place to set things down, not even by the power outlets. Since recently repainting the room, I am reevaluating the setup of the bath accessories. With the current placement of the mirror relative to the tiles on the wall, there isn't space to mount a shelf on to the drywall portion above the sink. I could get a tile bit and mount it on the tiles, but I would prefer not to make holes in the tile.

That being said, are there any, more economical options similar to this?