The Canon USA store has stock of refurbished Canon Mount Adapter EF-EOS R. The refurbished price is $63.99 (Reg $99) and comes with a full 1-year Canon USA warranty.
Canon Mount Adapter EF-EOS R Key Features
Mount Adapter Allows EF/EF-S Lens Compatibility with the EOS R Camera.
Exterior Design Matched to EF Lenses.
Dust- and Water-resistant.
Metal Mount on Both Lens and Camera Sides Provide Rugged Flexibility.
Refurbished Mount Adapter EF-EOS R $64 (Reg $99)