Replying to Selling Used Gear Survey

Hey Guys!
I am an intern at SidelineSwap.com and wanted to know your opinions on buying/selling used gear on sites other than NS. We are trying to make used gear sales safer and more jerry friendly. I know it sound corny, but I mean, I would rather sell stuff to a jerry than not at all. Let me know your thoughts, both positive and negative. Why wouldn't you use it? Why would you? Etc.

Also if any one does want to list gear, DM me your username and I can hook you up with no commission fees on your listings.