It looks like fake site offering you to refister your credit card before knowing any facts. I'd keep away regardless weather I'd find out the subscription cost or not.
Audio Bluebook Subscription Price
How much does an Audio Bluebook subscription cost? There is no way to find out without providing credit card info.
The "pricing" page is a sign-up form -- there's zero information about pricing anywhere.
The "pricing" page is a sign-up form -- there's zero information about pricing anywhere.