Use some looting, rummaging, or a wheel to dump instants and sorceries into your graveyard, or I dunno, cast spells
Card Set(s) -Awakening of the New Era- [OP-05] CARD VIEW OP05-022 | L | LEADER Donquixote Rosinante (Parallel) Attribute Special Block Icon 2 Type Navy/Donquixote Pirates Effect [Blocker] (After your opponent declares an attack, you may rest this card to make it the new target of the attack.) [End of Your Turn] If you have 6 or less cards in your hand, set this Leader as active
While this isn't an exact science (since expensive reprints will limit the price of new cards, which might be hurting the Bant deck a bit because it has the highest-value reprints), this system works pretty well in general
However, nothing stops you from playing Historic Pauper games with a friend by choosing "Historic" and restricting yourself to non-banned common cards
Tell us roughly how many commons, uncommons, rares, mythics, basic lands and foils you have in the bulk lot section and we will price it on inspection