Flowtron BK-15D Electronic Insect Killer, 1/2 Acre Coverage $20 + Free Shipping w/ Prime or on orders $35+

Amazon has Flowtron BK-15D Electronic Insect Killer, 1/2 Acre Coverage for $20.00. Shipping is free w/ Prime or on $25+ or $35+ orders (minimum requirement varies by location).
Walmart has Flowtron BK-15D Electronic Insect Killer, 1/2 Acre Coverage for $20.00. Shipping is free w/ Walmart + ( free trial ) or on $35+