I just checked "Seinfeld" through IMDb and its DVD icon link to Amazon.com.
Cut & Paste if there's no Hyperlink.
http://www.amazon.com/Seinfeld-Season-7-Jerry/dp/B000IFRT4C/sr=1-1/qid=1164734419/ref=pd_bbs_sr_1/103-0686802-0510218?ie=UTF8&s=dvd
The latest DVD Season Set (Season 7) is one of the Bestsellers of 2006.
Check the Customer Comments... Funny Stuff!
Jack.
Unfortunately, "An Inconvenient Truth" is the #7 best seller on that same list. (: