The Twilight Zone Series on DVD

If there is anyone out there who is a Twilight Zone fan (the original), I found DVDs that are only $4.99 ($14.99 list) each with 4 episodes per DVD at Amazon. I've looked around other sites, and these are selling for $7.99 and $9.99 elsewhere. Take a look at The Twilight Zone Series. I ended up getting 10 of them thanks to a gift certificate we received for Christmas, with hopes of getting a few more later. There are 43 in all. Why don't they make TV shows like this today?