I've been waiting for a good price on this ever since Romo struck about Cabrera to end Game 4. It's a Festivus miracle!
For a few days (until the end of 2012, at least), you can get the 2012 World Series 8 DVD set for less than half price. I just bought mine, and it's a screaming deal. The DVD set is normally $59.99 at mlb.com but is 25% off until the end of 2012. And it contains the Giants radio broadcast, so I can listen to Miller, Flem, Kruk, and Kuip, so that makes me very, very happy.
Step 1: Buy this Groupon (pay $20 for $40 worth of merchandise on mlb.com). I believe you have until the end of the year to purchase this. It is valid until March 31, 2013, but I bought it and used it immediately because of the sale described in Step 2: http://www.groupon.com/deals/mlb-com-shop-san-francisco-3
If you don't have a Groupon account and don't mind giving me a referral credit, go here to sign up: http://www.groupon.com//raf/UserReferral_rp/121015/10r1act/lk/uu159075
It's no skin off my nose if you'd rather not give the referral credit. It's a great deal regardless.
Step 2: At 25% off, the DVD set is $44.99. Pay for it with the redemption code you got from Groupon.
With tax and shipping, my total at mlb.com is about $11. (The taxable amount is $4.99 instead of $59.99, saving an additional $5.50.) Add the $20 I paid to Groupon, and my overall total is about $31. Without the Groupon and 25% off, my total would be about $71. Your total is dependent upon your tax rate and location, but you'll save at least $35 ($20 from Groupon + $15 off from mlb).