Amazon has this Oral-B Professional Precision 1000 Electric Toothbrush for $39.99, but you can get it for $19.99 when you use the $20 mail-in rebate
. It has an average rating of 4.3 out of 5 stars and features a pressure sensor, improves gum health, and removes up to 2x more plaque than a manual toothbrush. Drugstore.com
has the same item for $59.99. Shipping is free.