Let me say that this whole DVD thing is over rated. Occasionally I will buy a DVD at places like Walmart or the local video store when they are on sale for $5.oo etc. When we rent, I try to rent from Red Box and there is a surplus of codes.
I personally like VHS tapes. My kids can drop them on the floor, walk on them and they still work. Try doing that to a DVD. I stock up at Garage Sales - my latest great bargain was 25 cents each. Woohoo