Shnoop.com via eBay offers the Braun Oral-B Deep Sweep Replacement Toothbrush Head 5-Pack, model no. EB30, for $18.99 with free shipping. That's the lowest total price we could find by $13. It's compatible with Oral-B Trimuph, SmartSeries, Pro, Vitality, and Pro-Health Power toothbrushes.