Being a Prius II owner i might be somewhat biassed , BUT:

The prius has an 8 year warranty on the COMPLETE HSD system, so the first 2 or three owners have nothing to worry about in the first place. Then the fourth owner:

- buys an engine that has to date only run in its optimal operating range
- has no gearbox, clutch, start motor to worry about (which allways were costly repairs in my second hands)
- has an onboard computer that will take every action necesarry to keep the batterypack in good health (including starting the engine for the sole purpose of filling the battery pack)
- will have a car graveyard full of 8 year old crashed Prii that will serve as cheap replacement source for the odd battery module that does fail (you only need to replace individual modules, and sitting in the middle of the car, they are likely to survive any crash)
- will probably still be using the first set of brake discs, and pass them on to successive buyers in good shape.

Let's wait and see what secondhand prices are within a year or two.....

So far my 2 cents worth, Lars