Received an email from the Shavershop.
IO7 electric toothbrush with code IO7 at check out has the lowest price at $219, which is 60%off of RRP $549.
IO8 is $299 and IO9 is $399, on sale without code.
On the page it says “member offer”. Perhaps need to log in your account. Or create a new one and stack it with $10 off coupon. Also stack with ShopBack or Cashrewards.