I have a hunch that there isn't a presale code for AMEX, I think it's the "Front of the Line" where they must be purchased with an AMEX card at the checkout.
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You are correct. No need for a code. If you have an AMEX you can purchase them. If you don't let me know. Take a look at the tickets and I can purchase and transfer them for you. I bought some but can still purchase 4 more if needed.
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