I prefer escrow.com for buying and selling remotely. It provides a bullet proof platform of protection for both sides of the transaction. Yes, it costs extra but it’s totally worth it. Even better than cash on the glass unless said cash and glass are in a very public situation where you are confident to a degree that you don’t feel like you need to bring a gun.
I kind of like the address verification idea, but would like to see a mechanism wherein anyone who is trying to verify someone’s address needs to input the address themselves (after having gotten it from the person they are trying to verify). The system could then tell them if that is the correct address or not. This would allow everyone to maintain address anonymity/control over who knows where they live. The last thing anyone wants is a publicly viewable “come and get ‘em” list of good addresses to burglarize. This includes the pin on the Pinside map. Most folks I know use phony pin markers on the Pinside map simply to avoid unwanted interactions with potential thugs. I’m sure Robin has already considered this, but worth mentioning just to be sure.
Thank you to Robin and everyone else who strives to make this a safer, more functional and enjoyable space.