I'm looking for a family minivan for a young family of three, and decided on a used Gen 3 Sienna (I've had great luck with Toyota--I've owned two older Corollas and a Camry). $15K is my budget (a little over/under is fine). I don't really care about bells and whistles. Safety and reliability are top priorities. I'm OK with waiting for the right thing to come along. What should I be looking for? Any thoughts, info, guidance you can offer is much appreciated.