Unless gambling is legal where you live, you would be violating the law by gambling online. Wire transfers, including using the Internet, to place bets are illegal if your local laws prohibit gambling.
Now, here's the thing. You probably thinking you won't get caught, right? Well, you're probably right. Law enforcement doesn't have the resources to track you down, and prosecute you.
So you're thinking I should take my ethical argument, and go suck an egg, right?
Okay, I'll suck an egg, but before I do, I want to take this one step further:
What do you expect to happen if the site you're gambling on screws you over? You'll have no recourse at all!
Most are going to have you agree to their terms of service which will almost certainly state that it's your responsibility to make sure gambling is legal where you are, and that they can keep your winnings if it isn't.
So essentially, you're out of luck.
Just like you can't run to a cop to complain that a drug dealer or hooker kept your money, but didn't give you drugs or sex, you're out of luck looking for reputable gambling sites.
And, btw, the Amazon terms of service prohibit you from using these forums to aid or abet in breaking the law, so don't be too surprised if this whole thread disappears -- especially if people start to come along with responses that actually do help you break the law.