On the left, you will see a "Drugstore.com" logo, with "$10 off your order of $50 or more" below it.
Click here to find a Oral-B Professional Care Smartseries 4000 Toothbrush for $99.99.
Below the product price, find "special offers" and check both checkboxes.
Add one to the cart.
In the cart, the price should appear as $40.
Enter your zipcode in the cart, and click "get estimate."
Create a new account if you have never shopped at Drugstore.com before, then check out.
The price should show an additional $10 coupon, making the final price $30.
A $20 mail-in rebate is available, however it clearly states the rebate cannot be combined with any other offer, including coupons.
You are using coupons to get this great price, so the rebate should will be denied and could be a waste of time if you try to redeem it.