Few things to remember.
These went half hours at a time, but really it's about 22-24 minutes of real time (commercials), so that would be 7-8 episodes (as previously mentioned.
The big kicker, is on some sporting DVD's I own, they have discs that are front and back, so in reality you can get 16 episodes on one disc, which is under 8 discs. You figure you add some extras, some promotions, put it on 9 discs, sell it in season sets (obviously meaning 3 disc sets), sell it for $40-$50, and you have it flying off the shelves.
Just an opinion.