Most appropriate way to sell unverified autographs?

[JLange]

Hypothetically speaking, let's say you pick up a lot with several baseball related items and in this lot is an autographed card that you do not wish to keep. You intend to sell this item, but you have no idea of whether the autograph is real or fake. What is the best thing to do? Sell it "as is" with a disclaimer that you have no idea if auto is real? Authenticate (if you can) and then sell with the authentication? Sell as is and offer to take return if buyer attempts authentication and is rejected? I am looking for some ideas on what others would consider fair and appropriate. I occasionally purchase lots that have these "problem" cards and don't really know what to do with them. I worry more about perpetuating another fake auto in the hobby than in losing out somehow if the auto is real.