Best Buy via eBay offers two Insignia Water Filters for select LG or Kenmore Refrigerators, model no. NS-LT600B-2, for $23.99. Opt for in-store pickup to avoid the $3.99 shipping fee. That's tied with our mention from a week ago and the lowest price we could find by $11. It purports to reduce the level of impurities in your drinking water.