Albert! Clueless! Say it ain't so! I'm a lawyer and I can tell you that the words "greedy", "pathologically self-interested", and "narcissistic" are not generalizations that are inappropriate when tied to the word "lawyer". Sometimes, guys, generalities do have general merit...
Solution? Low-yield, tactical theatre thermo-nuclear device with atmospheric detonation.
Seriously though, here's my advice. I NEVER EVER audition components for someone else, much less haul them over to someone else's house! (the only exception being when its a local buyer and its an over $5K piece and your interest in having them not call the next day to say its mysteriously broken overide rule no. 1).
Basically, there are a ton of tire-kickers in this hobby and their problems at honesty seem to be exponentially amplified when they get in the process of a wanna be deal. If you know what you want, buy it. If you want to demo gear, go to a dealer and pay retail.
A good lesson here. Don't ever get too eager to do a deal that you break the rules.