I am getting a lease car in a couple of weeks. When it's arrived, I'm going to quickly sell my 7 year old car with average mileage. It will go to webuyanycar, or Motorway.
When I sell it there will be about four months left on the MOT. Would it pay me to get a new 12 month MOT? It should pass a test, but of course you can't be sure.
In my experience, I'd say 'No' - I sold a 4yo Audi with about 20 minutes left on the MoT via Motorway and they couldn't have cared less - the crucial thing was the bodywork condition and their inspection.
I would be surprised if you got the cost of the MoT back from webuyany car. In other words, they wouldn't give you more than a few pounds more for it with a 12 month rather than a 4 month MoT, certainly not what the test would cost you.
I admire your courage; I'll stick to my reliable old diesel, thanks. I had it serviced last week and the man who collected it commented on how well it was running and that they were having trouble with the new electric cars.