Understanding that if you're selling them faster than making them, generating new interest isn't your highest priority. That said, if that changes I think it'd be awesome to have some kind of loaner program. At our shop we'd be hesitant to plunk down the coin to buy one site unseen, but I could definitely see borrowing (or renting) one for a week or two to get a better understanding of what kind of value it creates for us first-hand.