I have for sale a wireless Gossamer SRM. Just had a new driveside crank srm installed and the SRM checked fully. Non drive side arm has a bit of scratching from my ankle but is otherwise totally fine. Non drive crank is the older gossamer style, two pinch bolts and a compression plug, much like shimano.
$1300 or best offer. I will get pictures up soon. PM or email capink@gmail.com