Waterdrop RO Reverse Osmosis Drinking Water Filtration System (NSF Certified) for $384.00 shipped. Here is a screenshot for reference. It is worth noting that at the time of this post, it has received 4.7 out of 5.0 stars after 953 reviews.
Brondell H2O+ Cypress Countertop Water Filter System for $110.97 shipped. Here is a screenshot for your reference. It has a 3-stage filtration with patented nanotrap technology & triple filter system and features a slim profile countertop design with continuous filtered water. Most places have it for about $127.
Paragon Maintenance Free Countertop Water Filtration System for $39.99 shipped. Here is a screenshot for your reference. It features a 25,000-gallon capacity, 5-stage filtration system, removes chlorine taste & odor, and requires no cartridges to change.
PUR FM-3700B 3-Stage Vertical Faucet-Mount Water Filtration System (Chrome) for $16.88 shipped after this $10 rebate. Here is a screenshot for your reference. It features a three-stage filtration to improve water taste and remove odor and built-in electronic filter life indicator to keep track of the filter life. Most places have it for about $27 or more.
Cuisinart WCH-1500 CleanWater 2-Gallon Water Filtration System for $99.99 shipped. Here is a screenshot for your reference. This water filtration system dispenses hot, cold or room temperature water and features a brushed stainless-steel housing, and removable water tank with 2 spigots. Most places have it for about $145 or more.