Foreverlux via eBay offers the Calvin Klein CK One 3.4-oz Unisex Fragrance for $14.99 with free shipping. That's $2 under our February mention and the lowest total price we've seen. (It's a current low by $8.) Deal ends May 11.
Perfume Empire 1 via eBay offers the Obsession by Calvin Klein Men's 4-oz. Cologne for $20.90 with free shipping. That's the lowest total price we could find by $9, outside of other eBay sellers. This fragrance combines amber, clove, lavender, mandarin, and nutmeg.