There was an article a few issues ago in "Orlando Attractions" magazine about this. The gist of the article is that any legit ticket discount will save you only around 5%, maybe 10% maximum...except for the exceptions that Master Yoda pointed out, such as timeshare presentations. More than that and it is probably fraud. In the Orlando/Kissimmee area, you may see these balloons advertising cheap tickets. The author of the article was explaining that places like these generally buy up unused tickets from guests and sell them for really cheap. Problem is, #1, it's illegal. #2, unless the no expiration option is purchased, those unused days will be expired by the time you buy the ticket. #3, even if the days aren't expired, the ticket won't match your fingerprint at the turnstyles and it still won't do you any good.