[GWN7]

There is actually 3 prices for copper (3 for aluminum and 3 for brass).

Here is a real cheap way to strip wire : Stripping copper wire cheap and easy - YouTube Different size holes for different size wire.

Another. Drill different size holes in a piece of steel and weld blades to it. HOMEMADE SUPER SIMPLE WIRE STRIPPER, Copper cable stripper - YouTube

This is a safer design, but you get the idea: http://www.youtube.com/watch?v=2o8Drsfpmu8&feature=related