Marriott travel checks are on sale at a 20% discount today only (April 11th) according to this article.
I finally found the site, but it was too late. The Marriott offer was only valid for Monday, but you might find other offers that you might want to take advantage of. I found the offer when I was on cruise critic.com. The address is dailygetaways.discoveramerica.com/calendar. It appears that they will offer a different special each day for a month. Hope this helps.