Assume Tesla gave you option to purchase free super charging for life when you buy your M3, what's the price you'd be willing to pay for that? I was thinking this as I'm assuming I'll barely ever use SC, maybe couple times a year. So for me the value isn't much, but some people who commute longer it might be critical. I think here electricity is about $0.10/kWh, so 75kWh would cost about $7.50 then, yes? And that'd give >300 miles. So in my thinking, say I use SC 10 times a year, that'd be value up to $75 a year. Maybe if Tesla offered free SC for life for $500, I'd probably take it. More than that, not worth to me. How much would it be worth to you?