Would you buy a new or used minivan? (I know some people here don't buy used anything on principle, but that's not what I'm asking. Just what is a better value).

We want a Toyota Sienna. The best used deals I can find is a 2014 for 23k with 40-50k miles.

My husband says he saw new 2016 at a dealer near his folks' house this weekend for 29k. His argument is that if you are only going to put 150-200k miles on a minivan you've already used up a third to a quarter of its life.

My argument is that because we can't afford to pay for the car in cash (though could pay it off in full in a year or two) that the cheaper is the better option.

ETA: the environmental impact is a consideration for me as well. I just prefer used.

So what do you think is the best value?