Kogan Soniclean Advance Power Toothbrush $39 Delivered @ Kogan
Got this through email, it looks as powerful as the Sonicare range.
Expertly combining high-frequency sonic pulse power with a high-density DuPont bristle brush, the Kogan Soniclean Advance Power Toothbrush delivers a professional-worthy oral care experience.
Delivers up to 38,000 sonic vibrations per minute
High-density, low hardness DuPoint bristle brush
2 Minute brushing timer with interval reminder per 30 seconds
5 Modes: standard, cleaning, whitening, massager, soft
Battery life up to 100 days on a single charge
IPX8 Waterproof rating
I'm not sure where it fits between an X3, or Sonicare but it's currently $39 with free shipping makes it cheaper than the X3 and any decent Sonicare model is $90+