As a matter of fact, three mirrors that I rented to my clients in a home I recently staged, became a bone of contention after the offer was accepted. The mirrors were not permanently affixed to the walls, but rather were hung on picture hooks. They belonged to me and not to the sellers. But.... the purchasers loved them and wanted them to remain. Remain they will. They lent a high end feel to otherwise plain bathrooms, much as did the mirrors in my most recent staging project whose pictures you see below.
Design Tip : Use high end looking mirrors to add lustre to tired bahrooms. You'll be sure to garner Rave Re:views and win the hearts of potential buyers.