CPO Outlets via eBay offers the Bostitch Pneumatic Stapling Pliers, model no. P51-10B, for $387.49 with free shipping. That's the lowest total price we could find by $12. The tool features a powerful shuttle blade for pre-compression and securely fastens up to two panels of double wall AB flute 500 lb. test board or four panels of single wall C flute 275 lb. test board.