It seems you have been nowhere but NYC...
In NYC/NJ, you can only buy liquor from licensed liquor store. Since most stores are operated by caucasian, you can not find 茅台. My friend in NJ could get 茅台"under table" in chinese restaurant with $50. It seems you know nothing about "Gray Channel". How can you survive in China? JOKE!
In California, any grocery store can sell liquor /wines. Warsteiner was right about 五粮液 vs 茅台. 五粮液 is about $32, more expensive than 茅台. But I still like 茅台 better.
BTW, SH men can't take much liquor. They are sissy...