It's kind of crazy that whenever we discuss adding a new guideline/rule, everyone screams that "Don't rock the boat, the For Sale forums are only here by the grace of CGC and could disappear at any time", and then these same people run raffles.
In fairness to the OP the distinction between good and bad raffles may not have been clear. It certainly would not have been to me. There have been "raffles" run in legit sales threads which were premised on each customer getting one ticket towards a prize for every purchase made, granted that is different, but, the difference is not as great as it seems.
There have been "mystery box" sales which premise the sale on one mystery box having a special high value key book, as an incentive to "try your luck". Again, it is different from a straight raffle, but not so different that I would consider it obvious.
I do understand why the Admin stopped the raffle, I'm just saying its not to me such an obvious point of difference. If, say, a thread was premised on everyone buying a "mystery box" of assorted comics, where one box had an AF 15 in it, people would buy mystery boxes without consideration of purchase, but essentially as "lottery tickets" in hopes of winning the real prize.
This suggests to me that the issue is less about process than about the value of prize offered. The more valuable the prize the less distinction there would be between purchase and lottery.
Mystery boxes when you show everything included in the boxes is a raffle. I don't see any other way to cut it.