There are a few times when the price is reflected in the product. 11 years ago I bought a bottle of Gran Centenario azul Gran Reserva from San Miguel de Allende. I paid $300 there. I only bought it because I liked the bottle. After trying it, I have bought it the last two times I went back. Slight increase in price, but nothing like you see for secondary prices here or online. This is actually a very very smooth and balanced tequila. This is a beautiful tequila made for sipping. They have a lower end product for under $30 which tastes nothing like the high end. Though it is still kind of decent. Not as good (to me) as Espolon. But certainly better than Don Julio (which has a nasty heaviness to the after taste) or Patron (which I find sickeningly sweet).
Espolon to me is the greatest Tequilia deal.
A friend told me about it saying it was made 15 minutes from where he grew up. Said it has all the same shit as the expensive brands, but no marketing costs, so the price is low.
So, I use that if I'm going to sip it or mix it with a neutral mixer like soda water.
Other than that, it's Costco's Kirkland brand for mixing. Haven't found out which name brand makes it for Costco, but haven't looked either.