tb80, I share your feelings. It's hard pickings for us who collect vintage webers down in Texas. I have noticed a few states where vintage Webers hardly ever pop up, and most of them are in the South, and span from Texas to Florida. As far as southern states go, SoCal and Arizona seem to be a little more blessed.
Of course, the closer you get to Chicago, the greater abundance you will find of vintage Webers. My guess is that in the 60's and 70's, Weber could only focus on so many new territories to expand into and those in Texas and the Southeast US just didn't make the cut. As you are probably familiar with, the standard type charcoal BBQ down here is Texas in the black barrel type grill or off-set type smoker barrel. Those were what people were familiar with and Weber probably saw a big hurdle in overcoming that down here in Texas.
MBH's are extrememly rare in Texas and most were probably brought in when somebody moved into state. I am not even sure an MBH was EVER sold off-the-shelf in the state of Texas. You see a few Mastertouch's here and there, but yes, 90% of Webers you see in Texas are 18 and 22 OT Silvers. C'est la vie of a Texas weber collector...
Hope you like black!