Lululemon Red Cool Racerback Tank Size 6

Red Lululemon workout top inbasic sweatwick material, pretty much identical to the Cool Racerback in stores (retail $50/each) Full disclosure, it's few yrs old & worn a decent amount (hence the low price) but in GREAT CONDITION...proof of the high quality!! No stains/spots that I can see. This top has so much life & wear left but it no longer fits and I'm looking for something smaller....possibly open to trades for a size 2-4