Purchase item in America for a fee

MY name is Paul and I live in Australia. Although I currently have a postal address in America (in Florida) which I sent packages I purchased on eBay, I do not have an American credit card. I am trying to purchase some Adobe software (legal software) from a business called MacMall, but they insist I must pay for it with an American credit card or American PayPal account. There can be shipped to my post office box in Florida (where I will arrange to have it sent to me in Australia). I'm wondering, if I was to pay you $20 (and of course put money into your PayPal account), would you be kind enough to order this software for me using your PayPal details? The software in America is so much cheaper than in Australia which is why I was wanting to purchase it. I completely understand if you do not want to do this, and this certainly would not affect us working together in the future. I just don't know too many people in America. The item is $288, and so I would cover these costs by putting the money into your account upfront. I would also pay you $20 to help me do this. Do let me know if you open to this idea. PAUL [login to view URL]