Ahh the link cam. While we at rerouted co-op are not particularly infatuated with this piece of equipment. We have had problems with link cams getting stuck in many cracks. They make for a decent piece of emergency gear for the casual trad climber.
With all rerouted co-op climbing hardware - we visually inspect gear but we are not safety testing. As always, when you buy used we recommend a re-sling. We would like to provide re-slinging services in the future, if you'd like to see this happen - please support Operation: Reroute It!