First off I would like to state that buying liquor isn't a challenge for me, as I can do it legally, my question is; are there ways of purchasing liquor cheaper in dnm's than in a legal store. Currently around me the liquor stores are all relatively pricey, and I hate paying $10-$15 more per bottle of liquor when I want to drink.
Shipping on a bottle of alcohol through any courier is illegal for a variety of reasons. Mostly state taxes and volatility. Anyone wanting to buy liquor online would pay more in shipping costs and markup for it to be worthwhile for the seller. You can't put parcels in USPS drop boxes over 13 ounces without printed postage, so you have to use online postage or take it over the counter. I see no logical reason to sell alcohol online unless you're in a state where you can get cheap grain alcohol and there's a demand for Everclear.