Groupon again offers the Replacement Brush Head for Oral-B 12-Pack
for shipping. That's $1.25 per head and $2 under the lowest total price we could find for this quantity elsewhere, although we saw a 12-pack for $3 less in August. They're compatible with several Oral-B electric toothbrushes. Deal ends October 1 at 1 am ET.
Of note, add two 12-Packs to cart for $23.98 and bag free shipping ($1 per head).