There you are at TJ Maxx, fluorescent lights buzzing, one hand on a Jenni Kayne sweater and the other hovering over a NARS setting powder priced like it fell off a truck. Or, you pop into the Dollar Tree to pick up paper towels and find yourself losing your mind because Jeffree Star singles, normally $17, are tossed on the bottom shelf with a price sticker that says $1.25. Sure, they’ve been repackaged in white cartons by a liquidator that was s…