Not sure how common they are, but I have found a few mispriced items on instacart. I found wild caught tuna for 1.99/lb. I believe it should have been 11.99 or 21.99/lb, but I bought 5 lbs (should have bought much more). Zevia 6 pack's were listed for the price of a can. I bought 48 cans for 8$ or so.