You should hang out on this forum for a little while, and sign up for some of the cash back sites. I'm always planning for a future Disney trip, so personally, I always purchase Disney gift cards when I can find a discount greater than 20%. 20% discounts are actually pretty common. Discounts of 30% or more are rare, but not unheard of - I probably catch one once or twice a year. If I have a trip approaching soon, I will purchase gift cards at a 10-15% discount. I will hardly ever purchase them for a 5% discount - I've usually got credit cards that will give me an equal or greater discount.