Woot offers Delta RS4007C-2 Single Bike Hook Silver - 2-Pack for $19.99 (reg. $57.99) free shipping with Prime. 

Product Description:
This bike hanging rack offers a convenient and space-saving solution for bicycle storage, that doesn't impose on your decor, like other bulky racks. This wall bike rack uses a simple design with a top rack, from which the front tire hangs, and a bottom tray that cradles the back tire.
In addition to keeping the hanging bike sturdy and just a few inches from the wall, the tray also protects your wall from tire scuff marks and dirt. The bicycle rack fits any size tire, so it's able to accommodate all styles of bikes. Assembly is easy, and all tools needed are included, so you're practically ready to go when you get it! Set of 2 for hanging two bikes on the wall. Assembly level/degree of difficulty: Easy.

• Color: Silver
• Size: 17" H x 3.5" W x 6" D
• Simple Design
• Fits All Wheel Sizes
• Sturdily Holds Bike in Place
• 2-Pack of Hooks