You have to contact your seller yourself. His contact information is on the listing and on the invoice.
It is a good idea if you want to pay cash, to contact the seller BEFORE bidding. Some will panic, most will agree.
You will not get your item in time for Christmas if you are sending cash or a money order. He will recieve it after Boxing Day. Then he has to ship it and you will recieve it sometime around Epiphany.
At Best.
And remember that you have not Buyer Protection if you do not use an electronically viewable method of payment. Most sellers (and most buyers) are honest, but ...
Yes, I have a heart that is three sizes too small....