There thing with an older Gen 2 Prius is the potential maintenance and repair costs in the near future.
The battery is going to need to be replaced son and is going to cost more than $1,600. I have not heard of anyone having any luck with cheap aftermarket batteries. And you can "recondition" your old battery yourself, but again with limited results. Thw only aftermarket battery that I'd trust is the one from
NewPriusBatteries. But for the price you're not that far off from an OEM battery especially if you don't want to deal with parting out your old battery modules.
There is talk of a LiFePO4 replacement battery in the works that many of the real Prius gurus over on Prius chat have confirmed works as intended in all sorts of road tests. I do have my doubts though.
Another potential expensive repair is the brake controller.
And yet another problem is oil consumption. I do thoroughly believe that if the oil were changed at least every 6 months or 5,000 miles these engines would last over half a million miles. But people go by the yearly oil change and then end up with oil consumption problems down the line, which in turn kills the catalytic converter.