No, it's not, but all cars require maintenance and you should know what they are an amortize them over the time you expect to have a car. For the added car life usage you should get on either Prius component, it is a bargain.

I don't know how much it actually costs, but taking the numbers here at face value, $1000 over 200,000 miles is half a penny a mile - that is clearly trivial compared to running costs of any car. One way to look at it, is if you assume $3/gallon gas and 50 mpg, then the cost of the battery is equivalent to reducing the gas mileage to 46 mpg, all else being equal.

Sure it makes sense amortized, but it's the equivalent of buying a gas engine that needs a rebuild.

It's a significant up front cost to consider against a purchase price.

Well, again, if the figures are roughly accurate, no it isn't. There is no way you're getting a new engine for $1000. Even if the price is understated, it should be simpler to install than a new engine.

That's why I said rebuild, not new.

its ~$1K, or less if its just one faulty module https://www.youtube.com/watch?v=Q3RCdrh666w