18oz Purex Crystals are part of the Kroger Mega sale and are priced at $2.49 when you purchase 4 participating mega sale items throughout the store. Buy three for $4.98 after the Buy Two get one Free coupon below or $1.66 each. No need to purchase 4 Purex Crystals just, participating items. Just be sure and purchase Mega sale items in increments of four to get the mega sale price.