batterys are designed to last 10 years or better in the hybrids, it's running them down and not charging them that shortens there service life, now what i remember most from my hybrid training is "don't screw with the orange wire"
one of our shop vehicles was a 2007 lexus 400h, sorry can't really say anthing great about it it was well made and comfy but driving it felt weird, i suggest you drive one for a day, everytime i backed up i though for sure i was gonna hit something, confindence issue for sure but with a vehicle going in reverse with no engine running then kicking in is unerving to me just couldn't get used to it, but its sounds like a great deal go for it if you like it