I have bought used Master Collection CS4 full commercial edition in April 2011. Then, the license transfer procedure was simpler than now (Order number was not required). Now I wanted to sell this program, but the answer during the procedure was:
Hello XXX, Thank you for contacting Adobe. The email is regarding the Transfer of license, I have checked and see that the
invoice you have submitted says that the product was purchased from ebay auction. I am sorry to say this ebay is not an Adobe
authorized reseller. Since the product wasn't purchased from an authorized Adobe reseller we are unable to transfer the license for
Adobe Master collection CS4. I apologize for the inconvenience caused to you. Your Customer Id is YYY, please provide this
number to us if you contact us in future.
Does that mean that I could have sold this software to someone before the changes in License Transfer rules, but now I can't do it?..
Yes, this is true - if you read the instructions on how to transfer, Adobe made a change recently to tighten down on transferring illegal or unauthorized copies of the products, since by far most (90%) of what is sold on places like eBay or Craigslist is pirated, counterfeit, OEM, grey-market, or worse...
You really have to be extremely careful trying to find legitimate/safe software on places like those, as it will be non-transferrable and not have other rights either, and probably not authentic.
Update (6 Dec.) -- We just put together a new article on this topic: