Thumb Score: +22

Amazon [amazon.com] has Terro 4-Pack Multi-Surface Liquid Ant Bait Stations on sale for $3.83. Shipping is free w/ Prime or on orders $35+.

Includes:4 pre-filled liquid ant bait stations
Adhesive strips for multi-surface mounting
Features:[list][*]Targets and eliminates entire ant colonies, not just visible ants[*]Significant decrease in ant activity within days