schematics for a pump shotgun, aka schematics for a pump shotgun, schem, schema, pump, shotgun, shotty, and shot

A length of faded printer paper festooned with diagrams and lines and shit.

It tells you how to make a pump shotgun with the following components:

1 - short steel pipe
1 - long steel pipe
1 - ammunition magazine assembly
1 - firearm trigger assembly
1 - firearm sight assembly
1 - firing pin assembly
1 - firearm breech assembly
1 - pile of scrap wood

Making this would take good familiarity with craft and good familiarity with rifles.
In the upper right corner is a note: 'First discovered by Dr. Dr.Crowley.'

It weighs almost nothing. It is a gun schematic. You think it might fetch about $2 on the market.