Not to take away from anyone thinking they can tell expensive from cheap wines but there are studies piling up that show even professional sommeliers are more influenced by label, color, and setting than the actual flavor of the wine.
I wouldn't use this to always buy "junk" wine, but I do my best to separate my own tastes from a price point. A $100 wine means nothing tangible to me compared to a $50 wine. Price is set by rarity or popularity, not actual taste profile. It doesn't cost that much more to make, age, bottle or ship, but is mostly marketing and price control to make it seem "better" (subjective quotes).
If you want to enjoy your wine more, controlling the setting seems to have more of an effect. Decant in a nice decanter so it seems pricey, play music that compliments the experience, and do anything else that relaxes you and puts you in a good mood.
"More evidence that wine-tasting is influenced by context was provided by a 2008 study from Heriot-Watt University in Edinburgh. The team found that different music could boost tasters’ wine scores by 60%. Researchers discovered that a blast of Jimi Hendrix enhanced cabernet sauvignon while Kylie Minogue went well with chardonnay."