My friend and I brought 3 day passes and camping each but it looks as though we can no longer go.

We are in London though and have to pick up the tix via Wil Call. If we were to sell the tix in the US (at cost) how could we get them to the buyer?

We could complete the transaction via Pay Pal for those with an account but I am not sure how best to get the tix to the buyer?