E: 12/12 Epiphone Masterbilt® Century Zenith Classic Guitar

Thanks - works fine for me in firefox

Yes it is. From the T&Cs:

"A note to potential International winners: If drawn from outside the United States, the winner is then responsible for all shipping, customs, and tax costs. Any winner who chooses or is unable to cover these costs will forfeit the prize and a new winner will be drawn at random."