This was a topic that was interesting to me, so I thought I would share the information here.
This post concerns the version of Pit pictured below. Mine looks nearly the same as this Canadian copy pictured below, but lacks the French on the cover. The copyright on the box is 1983.
Most copies of Pit allow up to 8 players, and another copy I have only plays 7. The 1983 copy is a pretty sweet one to own: it lacks the orange bell, but it allows 3-10 players!
The commodities are still 9 cards each, and include the following (points for each are in parenthesis): wheat (100), soybeans (55), rye (70), corn (75), sugar (65), barley (85), oats (60), hay (50), cocoa (80), and flax (40). The bull and bear cards are also included.
The only downside is that if you want to use a bell when you play, you'll have to scavenge one from elsewhere. I took mine from that 7-player copy I had. It's incomplete anyway.
I finally scored a complete copy off of eBay. Best of luck to anyone looking to play a boxed copy of Pit with a larger group. I haven't tried it with that many yet, but would love to hear if any of you have.
Hope this info helps in your future Pit purchases.