I was gonna say amazon. They regularly throw flash deals for 24hrs at me on my home page.
They had one the other day with Bluetooth and all that guff down to £78 from £240 something. It went back up to original price 24hrs later. I do get similar offers once a week (ish).
I was a very late to the electric tooth brush party. It's the best thing I did and have a mid model sonicare (none of this connects to phone nonsense) . I definitely brush longer as on a timer and mouth feels cleaner.