question about seinfeld season 4.5.6.7.8
 

i know there like 8 seasons of seinfeld maybe 9 i just recently bought 1&2 - 3 i know there alot of very good episodes not shown i wanna know when i can get these seasons has anyone heard the release of seinfeld season 4,5,6 i guess there gonna do 3 at a time then 7,8,and i guess 9 if there is a 9