Oral-B is currently offering a rebate promotion on their rechargeable toothbrushes. With this promotion you get 50% of the cost of the toothbrush back via mail. You can take advantage of this promotion in-stores just looked for the especially marked boxes that have the rebate form. You can submit this rebate up to three times per name, address or envelope. Purchases must be made by 10/30/10.
You can also take advantage of this promotion online by shopping on Amazon for Oral B products. They are also on sale and you can get a toothbrush for as low as $23 each.