Almost all go out of date before they are ever sold - those that actually do work are not sold to consumers, typically, and the people that sell the other scripts are merely hoping that you won't go through the hassle of a charge-back over $15 - $50 (And you won't always win on virtual goods for PayPal anyway.).
I precisely remember that ads on craigs was a paying advertiser on NP from Jan - Mar 08 so if the opinions have changed since I think all members should know and it should be backed with complete reasoning after it was a site sponsor - just for good measure.