Last year it was a buyer's market, the 2008 Prii going at under 3 million. Now you'll be lucky to buy one for less than 3.4 million. It's all market trends. Your ONLY argument in all of this the fact that you're comparing hybrids with cellphones; if you had an inkling as to how Toyota's HSD worked you'd know the system works first and foremost to ensure the battery pack's longevity. As with anything, there are times when something can fail (thus why manufacturers have MTBF and Duty Cycle ratings and all that). Having said that, had you bothered to gather some real world data on the performance of a Toyota Hybrid, you'll know they're just as reliable as any other car. There was a first hand account from a Canadian fleet owner who only runs Prii in his fleet, and even by the time he disposed of his 2nd gen models, they still had perfectly usable battery packs. And some of the cars had run in excess of 600,000kms.
As for why I'm a hybrid fanboy? I don't think I am; rather I'm a fan of correcting misconceptions and mindless drivel spewed by the uninformed.