Has anybody ever used any of these sites to purchase tickets and if so how was your experience? We generally always use Undercover Tourist but I was debating what number of days I needed for our September trip and unfortunately it seems like I waited too long and they no longer have tickets at the old prices but it appears as if the other sellers do as I can get tickets for about $100 less for our whole party. I would love to still get the cheaper tickets but not if they aren't reputable. I used Touringplans ticket calculator and this was how I heard of them. Let me know your experience. Thanks.