In business there are two philosophies for dealing with customers. I'll call them "transactional" and "relationship." Every positive dealer story or recommendation I've ever heard involves that dealer building a relationship with the customer. The Covina dealer missed a golden opportunity to meet you and build a relationship so that you would buy preferentially from him/her in the future. Anyone wanting to take the time and trouble to audition and operate a Brinkman turntable, and who has a complete audiophile grade setup, is a valuable future customer. Sadly, the dealer seems to operate in a transactional mode which is completely opposite IMO from the model of a successful high end dealer.
Many moons ago when I lived near Portland, OR, I did business with a few dealers but one in particular got most of my business. I could just stop in and shoot the breeze on a slow day and when he got something in that was cool he would call me and invite me to come over and listen. I bought pieces from him that I didn't even know I wanted to upgrade.
My point is, when buying high end products, seek out businesses that focus on a relationship instead of the immediate transaction. If we are ready to spend five figures on piece of gear the sales process should be pleasant and fun.