How many of us are there? Owners of Dodge based RV's?

Axiom 6: Consider used tools, from craiglist, garage sales, and so forth.

There's a number of reasons people are selling serviceable tools. They may be going out of business, they may be experiencing a financial crisis, they bought a tool for a one-time task (Axiom #5), or they've discovered they've violated Axiom #1 and bought a tool they're obviously never going to use. (All of which explains why you sometimes find new tools for sale through these sources.)