Walgreens:

Buy 2 Off Clip On Misquito Protection $9.99
Use $2.00 May Wags Coupon (will deduct $4)
Use B1G1 FREE – Off! Clip On Starter – (off.com)
Also use $2.00/1 – Off! Clip On Starter – (rightathome.com)
Final Price: $2.49 each

Thanks Deal Finding Chik

Target:

Buy 2 OFF Clip-On-Fan Circulated Repellant $7.99
Use 1 BOGO Free OFF Clip-On-Fan Circulated Repellant – (off.com)
Use 2 $2.00/1 – OFF Clip-On-Fan Circulated Repellant, Target coupon – (target.com)
Final Price: $1.99 each, when you buy 2*

*if your Target only allows one Target coupon per transaction, then these will be $2.99 each, when you buy 2.