Ebay offers PUR Faucet Mount PLUS Water Purifier Filtration System for $22 (reg $40) with free shipping.

Product Description:
Each PUR water filter is certified to reduce mercury and certain industrial pollutants, as well as reducing chlorine (taste and odor) and more.1 PUR faucet filtration systems are certified to reduce 70 contaminants, including lead, mercury, and certain pesticides.1 Certified to reduce lead and 10x more contaminants than Brita's leading pitcher filter.1,2 As the #1 selling brand in faucet filtration3, the included Mineral Core technology filters water over natural minerals for a crisp, refreshing taste. PUR has been developing innovative technologies for superior water filtration for over 30 years.
1 PUR does not filter microbes.
2 Versus best-selling Brita pitcher filter OB03. Brita is a trademark of Brita LP.
3 Based on Nielsen sales data for the 52 weeks ending 07/03/21.

• Dimensions (Overall): 5.25 Inches (H) x 2.5 Inches (W) x 6.5 Inches (D)
• Weight: 1 Pounds
• Water Filtration Compatibility: All Standard Faucets
• Capacity (Volume): 0 Ounces
• Filters: Pesticides, Mercury, Lead
• Maximum Filter Life: 3 Months
• Material: Plastic
• Care & Cleaning: Spot or Wipe Clean