Vouches don't mean shit here even from high rep users, they all give fake positive vouches either as a free copy they received or say they bought it which is bullshit.
The problem is the mods don't ban the people who give fake vouches to scammers, if they did, half of the high rep and rank users would be banned here, the only sure way anyone is safe buying these methods is to use mm until the buyer confirms the method is actually profitable and earns some money with it, then release the money, not being total bullshit like more 80% of the posts in the ebooks section, which either involve deceiving other people to earn money, scamming people for money, outdated useless methods, or totally fake methods.