turo.com facilitates giving cars worth tens of thousands to strangers for less (per day). They do claim to be insured, though - but I'm not going to be putting them to the test.
The information asymmetry and friction with these niche p2p sharing services just isn't worth it. You're basically learning the rules of an entirely new industry with each one - a significant amount of mental bandwidth to discover whether or not it will even work for what you need.
Sharegrid reached out to me once (because I was selling a camera on Craigslist). I looked over the site for about an hour and still would have had no idea about this "voluntary parting" issue.
Are you saying Sharegrid was suggesting you should instead keep the camera and rent it using Sharegrid?
Quite some sales technique if so...