Depends on your definition of a scam. Are you going to get delivered a method? Yes. Will it make you $3000 a month? Probably not.
Most people in that niche of selling methods take free info from BHW/other IM forum, rehash it into a PDF, and sell it. There's another IM forum which I won't mention. 99% of the threads there are teenagers selling weird methods that are short term/only a matter of time before they get patched because of the crazy bullshit they outline. In fact their sales pages look just like the stuff on buysellmethods.com.
Look @ BHW downloads section, it's loaded with "paid" methods people leaked. There's also other forums with a bigger catalogue but I can't mention them. You will realize soon that a lot of paid methods are waste of money. But if you have $30 you don't mind losing then why not. You'll either learn hot info or regret the decision.