Sadly, while I SUPER hate Wal-mart...I too get pumpkins from there mainly.

If you dig to the bottom of those large cardboard bins, the really huge ones are down there. You can get large ones for like $3!

I also go to a lot of other places and buy pumpkins, just to spread the money around and try to overcome my guilt for buying from Wal-Mart, hah hah.