On Amazon.com where you can now get this
3M Command Picture Hanging Strips 18-Count for just $8.39 shipped or less (regularly $22.10) when you clip the digital coupon.
These Command Strips can be used to hang pictures, home decor, and more! They can hold up to a pound and can be removed cleanly when you’re done using them. These are especially helpful in places where you want to avoid using nails or screws, like rentals or RVs.