I know amazon sells more than DVD's but thats what i use them for.
I picke up 3 john wayne box sets with the 30.00 credit for signing up for their visa.
Worked out to about 3.18 per DVD.
You could instantly save $30 today with the Amazon.com Visa® Card :
Save $30 instantly off your first purchase§, earn up to 3% rewards,
get a 0% initial APR, and pay no annual fee.
I could not find a page with the offer, I think they just make u the offer at checkout.