What can you not resist purchasing when the price is so low that you just must buy it?

what can you not resist when it’s on sale, even though you may not need it?

for me it’s nice soaps, fancy soaps in floral or exotic scents. if they’re not too expensive i just have to buy them, even though i already have a supply. also if i see clothes or shoes for my daughter on clearance i’ll pick them up.