I was showing a friend the shore excursions for a cruise I'm taking. I cut and pasted a URL to a particular event, it looks like this:
Check out the last variable in the URL. Yes, it really works. Go ahead and change the tour price to $2 or $84234 or whatever you'd like.
Now, I think I understand why they did this. You only see the page with the numeric price if you're booked on a cruise and signed in to the site. You can "buy now", which shows the correct price, no matter how you've messed with that URL. If you're just browsing their site, not booked, then the pages just display a number of $ marks, depending on how costly the excursion is. I'd guess this lets them use the same code for the booked passengers as for people just browsing the site.
Too bad, I was really looking forward to playing 18 holes for $4.