That is, you can make niche highs just as you can make niche wine flavors.
Now perhaps once the major PR and ad companies get behind the concept we'll see luxury pot brands charging premium prices, and perhaps we'll even see pot snobs who look down on anyone paying less then $15 a joint. With the right marketing campaign you can sell basically anything for basically any price, so I suppose the $500 oz. will probably become a reality if pot is fully legalized, and there will no doubt be plenty of suckers lining up to buy it.
In fact, I was probably wrong when I said that legal pot won't see the same prices as high end wines. The reason we haven't seen those sorts of prices is because the semi to illegal nature of it has meant a lack of fully protected brands and trademarks and advertising. Once we have those then there will be real money to be made.
None of these applies to cultivation of pot, even the more exotic varieties. As it can be successfully grown indoors, the conditions for creating it can be created just about anywhere. There is none or very little post-processing involved and the supply chain is astonishingly short.
So I think the comparison to things like wine and coffee are incorrect, as these 'commodities' actually require exact growing conditions and post-processing to get high quality results.
A better comparison would be tomatoes. There is very little price difference between the cheapest tomato and the most expensive, highest quality, organically grown version. I'm not saying that pot is like tomatoes, just that the market conditions are closer to tomatoes than they are to wine, and so the price discrepancies are unlikely to reach the levels between a cheap bottle of no-label wine and a bottle of vintage Dom Perignon.