I was thinking about purchasing a used CS6 Master Collection license. My only question is, if it is a valid license, based on the licensel/software working after it's keyed in, do I need to validate anything else? I figure it either works or it doesn't. If it works then, it's assumed that the provided license is official and I won't have to worry about it begin a bootleg or invalid license. Any help is greatly appreciated. Thanks
As Bev noted, you may want to think twice as there are a lot of bogus scams around that type of thing.
A common one is selling a serial number from a term-based licensing agreement where the code "looks good" but will expire, and the buyer is unaware.