But be prepared for some sticker shock.

The one I had (that just went South couple days ago) cost less
than 15 USD a couple of years ago.

The cheapest Oral-B I could find retail around here was close to
eighty dollars.

Finally wound up paying $100 for a two-pack of "Professional
1000" models at Sam's Club - figuring that the extra twenty was
well spent against the day when one failed again.

I'm thinking all this is some kind of marketing ploy by Oral-B,
since Colgate offers electric toothbrushes at under $10 - albeit
not with the reciprocating action of the Oral-B.

The expensive Oral-B is rechargeable, the Colgate (et alia) are not. Hence
the price difference.

What's despicable is that Oral-B and Philips (Sonicare) provide no way of
exchanging the batteries. Once they fail, the unit becomes yet more
electro-mechanical trash.

Before anyone responds... Yes, I'm aware how difficult it would be to make
the units water-tight.