schematic for a piston hammer, aka schematic for a piston hammer, schematic for a piston hammer

A mechanical schematic for building what seems to be a huge piston-driven powered melee weapon.

It tells you how to make a piston hammer with the following components:
2 - hydraulic cylinders
1 - force shock absorption assembly
2 - broken battery packs
2 - ballast assemblies
4 - long steel pipes
8 - o-rings
1 - bag of gunpowder
1 - bottle of monomer solution

It weighs about 100 grams. It is a electromechanical schematic.
You think it might fetch about $2 on the market.