Motortrend says a new battery pack is $10k-20k...which will have to be paid for by the consumer after 100k miles (or more miles on top models). That's a lot of money to have to poor into a used car with that kind of mileage to keep it running.
If you want to just dispose of it, I do wonder how much you will get charged. I can't imagine they just take those things at the dump, or just park them down by the river. Maybe Tesla takes the batteries back and will dispose of the car for you?
Seems like an environmental disaster waiting to happen.