Tesco currently have Oral B Vitality Electric Toothbrushes for £10.00.
These have an RRP of £29.97, but are always on half price offer, so really the normal price is £15.00.
I'm not sure if they have all five versions at this price, but they certainly have the Dual Clean, White & Clean and Precision Clean versions. These are the V2 models and come with 2 brush heads in total.
The expiry date is 10/11/2009.