I have a Prius and lurk on several online Prius forums. Folks with accident damage seem to be quoted $1-2k to replace the battery pack nowadays. The prices are definitely coming down, both as a result of volume increase and because battery packs from old or junked Priii are starting to fill the pipeline for recycling.
What galls me about threads like this is the eagerness of folks to believe things they earnestly want to believe. It’s the exact point-and-laugh mentality seen in Bush Derangement Syndrome, just directed in a different vector. Folks, don’t believe everything you read. Investigate a little. Better yet, in this case maybe talk to an owner, and you’ll find that this is a fantastic, capacious, safe, fast, reliable and durable car that just happens to put fewer dollars into the pockets of sheikhs and jihadis.
I just checked the Yahoo autos site. The Prius didn’t get good ratings on anything but mileage. I guess it depends on why you buy the car. After all it is a car not magic.