You can check out all of the tech deals available in our Cyber Monday round-up.
We reviewed the Oral-B iO (Series 9) and gave it 4.5 out of 5 stars, rating it for its excellent cleaning performance. The iO has moved on from the oscillating brush head of previous generations to micro vibration technology - and it's extremely effective.
The issue with the iO Series 8 and 9, however, is that what you're paying for is the full colour OLED screen. These are the first brushes to feature one and it means that the iO has an RRP of £500, with a usual price of about £250.
At the moment, the iO9's price point hasn't shifted but prices are starting to come down on the iO8. Right now, you can buy the iO8 from Boots for £180 in the black onyx colourway or in violet. That's £70 off the regular price.
Prior to this, the best price we saw for an iO8 was on Amazon on Prime Day, when the iO8 dropped to £189.99.
However, if you want to buy a pair if iO8 brushes, there's an excellent offer on Amazon UK to buy two for £249.99, which works out at £125 each. This is a really solid discount but the snag is that you'll be sharing a charger and travel case, so you can't split the deal with a friend.
The iO Series 7, which features much of the same tech - without the full-colour screen - is better priced, with an RRP of £400 and a usual price of £200+. Right now, the best deal we can find is on Boots, where it's £150. The same deal is available on Amazon UK.
To see which electric toothbrushes we recommend, check out our round up of the best electric toothbrushes we've tested. If you're interested in deals from all brands, check out the best electric toothbrush discounts we could find right now.