Walgreens has a month-long buy one get one 50% off promotion on 1.6-ounce Secret Clinical Strength Deodorant. Check your store for select varieties possibly on clearance for $4.49 and also part of the promotion. Buy two deodorants and use two $2.00 coupons at the register. Final price: only $1.37 each!
Please note that clearance may vary by store.
At my store, I also found Gillette Clinical Strength Deodorant on clearance for $4.99 and on a buy one get one 50% off promotion. Buy two and use two $2.00 coupons to pay only $1.74 per item!