So, as the part quoted above is 600 Euros, that tells me that it is not £450. It also tells me you cannot get the part here.
That site also requires a 'workshop login'. No idea what that is, but as a consumer it means NOT ME.
I am not put off the car as such. Still like them very much, but will not buy one that does or may need this doing within my ownership.
As for the little boxes on ebay. From what I read, yes they can reset the counter. BUT, would you want to? Imagine SCUBA diving. Your oxygen tanks is telling you it is near the end, so you just reset it so it says there is plenty left. I genuinely think you would be a fool to do either.
Yes, I know the SBC doesn't switch off immediately on getting to the limit, but the fact that someone CAN reset it is a concern.