Amazon offers the Oral-B Professional Care SmartSeries 5000 Electric Toothbrush
with free shipping
. That's the lowest total price we could find by $6, and the best non-rebate price we've seen. (Most merchants charge $110 or more.) This toothbrush features a pressure sensor (to signal when you're brushing too hard), timer, four brushing modes, two brush heads, in-handle display, charging base station, and more.