What happens if i order a $8,000 item and my billing address is my old house and the item is my new home and my gift card only has $1 left
Nothing, I've ordered plenty of things on my credit card with one address to be delivered to another address. But you need to change the billing address on your card.
You should change your billing address so that the item can be delivered to you. It might be delivered to your old address if you request for shipping.
It's through amazon so change the address and it will be able to see that there is only a dollar left before it gets sent out
A bill to your home