You're missing my point a bit I think - I agree it's a nothing issue IF that's what the actual problem is. If it's only the switch, why on earth hasn't the seller just changed it for moving the car on? Questionable imo
I can see your point completely in that if it were my car, I would have replaced it before selling it too as I wouldn't have wanted anyone to think there were any more serious problems at play. As pepsilol said though it's staggering how many people don't bother replacing them as they cant be arsed.
I've gotta be honest, I only put a bid on it as it was relatively cheap as I keep seeing facelift coupes go for £4k plus most of the time. I know that's for good reason owing to service history and less mileage but thought on the whole this one sounded like it wouldn't take much to be a good summer car.