Such a coin will always be worth more intact than redeemed. If you are not in a rush to access the funds, then I personally suggest selling the coin to one of us here on the forum. I'll personally offer you more than peel value + the shitcoins also present without even seeing a picture of the coin. That said, if you are going to sell it, please upload some photos
There's a few of us that act as escrows here on the forum for coin deals. A buyer would pay one of us, you post the coin to the buyer. Escrow then releases the funds to you.
Good luck if you choose to sell. Whatever happens, it's always a sad day when someone chooses to peel a Casascius Error Coin. Please don't do it unless the coin is in such a bad state that nobody would pay more than face value for it.