Thank you for your advise, just to let you know yesterday I bought a TGA Breeze 4 in a pretty ice blue colour, it arrives in 2 weeks time.
It is second hand, but through a really nice company who have the contract to buy them from the motorbility scheme, so I know it will have been serviced & well maintained, plus I get a warrenty with it.
They did say that it had very little use & looking at the photo's I have to agree, they also said that it had to have new batteries (the longer range per charge ones) because it had been sitting unused for some time. they are also including a set of gel batteries.
I am doing my 'this is a tool' thing, in that I swallow my pride & remember that I will be able to do more without as much pain.....so in short it's worth it.