You think the Real Real is safer? They are full of fakes. I think that is worse because people are lulled into a false sense of security, thinking the site preauthenticates their items. They don't. If you get a fake and complain about it, they will give you a refund and then put it back up for sale. They never remove fakes from their site when they are informed.
I’m not a fan of The Real-Real, however, I do know that from my experience if a fake is spotted and reported to them they will remove it. I was given a $50.00 site credit for doing so.
All these big consignment/reseller’s do have flaws from the too big too soon scenario and not enough knowledgeable staff.