How would I go about selling a signed but sealed item?

[g6t9ed]

If it were me, I would try to sell it sealed, use the packing slip for proof. If you aren't doing it through eBay or if someone requests that you send pictures of the signature, maybe ask for a non-refundable deposit even if they choose to not buy. So this way you can sell the edition opened but still get comped for the loss of seal.

Don't know how you would feel about that but I guess it all depends on the potential buyer's knowledge of how these were sold. Hope that helps.