I just want to warn you that websites like 7jailbreak are a scam. There is no jailbreak available for iOS 7 currently. If it is released, it will be available for free and sites like iPhoneHacks will provide easy to follow guides for free.
You should not pay for a jailbreak. So stay away from sites like 7jailbreak that claim they've the first jailbreak for iOS 7. They're a SCAM.