I'm selling a set of like new Black rapid straps, both the Curve and the Wrist strap along with a FR-3 fastener that screws into a camera's tripod socket. I just replaced the rubber washer on the fastener so it is functionally new.

This strap attaches to the tripod mount instead of the standard strap holders on a DSLR, they allow a camera to rest at your hip while allowing you to slide the camera up the front of the strap to your eye to take a picture.

For more information: http://www.blackrapid.com/products/curve

The wrist strap offers a more compact option to secure the camera, it shares the same attachment point as the sling strap.

I'm selling both for $45, they list for over $80 total, price is somewhat flexible.