If you're interested in an NCAA/NFL pool...
Sorry if this isn't the correct board, I looked around and it seemed like the best place.
I participate in a good pool every fall where you pick five games (NCAA or NFL) against the spread each week. If you get all five, you win the weekly pot (or split it with any other winners), and the weekly pot is usually $450 or more. If nobody gets all five, the pot rolls over to the next week.
There's also a season pot for the three participants with the highest winning percentage over the season.
Cost is $93 ($5/week x 18 weeks + $3 for the web site where it's hosted). In past years there have been 100 or more participants so it's a large group.
If you're interested, send an email to firstname.lastname@example.org.