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Amazon [amazon.com] has 12-Count Terro Borax Formula Indoor Liquid Ant Bait Stations for $9.58. Shipping is free w/ Prime or on $35+.

Walmart [walmart.com] has 2-Pack 6-Count Terro Borax Formula Indoor Liquid Ant Bait Stations at a bit lower cost of $9.32. Choose free store pickup where available or Shipping is free w/ Walmart+ (free trial available [walmart.com]) or on orders $35+.