There is no local option for me to purchase bulk 10 gauge wire. I have found one solution, in the form of JCWhitney.com. They sell rolls of 10 gauge wire in 25ft for $13.89 (on sale for $11.89 at the time of this posting) and 50 ft for $22.99 (I caught some on sale for $19.54). My cost for shipping 2 rolls of 50ft was $8.99.

Here is the link:

http://www.jcwhitney.com/jcwhitney/p...0001&pageid=12

They also have other gauge options as well.