I need front page clarification on: 1) What if I rent out my lens and the renter breaks it? 2) What if I rent a lens and I break it? 3) What if I rent a lens

I need front page clarification on: 1) What if I rent out my lens and the renter breaks it? 2) What if I rent a lens and I break it? 3) What if I rent a lens and return it safely, but the seller fraudulently claims that I broke it? These are questions that eBay has answered to a pretty good extent, given the limitations of person-to-person commerce. It's essential for a high-value marketplace like this.