Right now is spring clean up time in Sunnyvale (CA). I have been seeing a multitude of sorry @ssed couches waiting on the curb for pick up. Typically the back sides are in excellent shape, it is the front and cushions that are shot.

A sharp pocket knife or razor blade would fetch you enough leather to wrap a couple of bikes. Just be aware that some leather couches have vinyl backs, but it wouldn't be but a moments work to find out.

Just a hint from a guy who has wondered what he could do with that leather!