Well, unless the new car has 0% APR and current average USED car APR is in the mid 4%. You are not saving as much as you may think.Brand new??
No way.
3-5 years old seems to be the sweet spot in my limited experience. I've owned 9? autos. I'm currently driving a 2002 pontiac that I bought in 2005 for $10k even. it was originally sold for $26K I think, so it depreciated $16K in 3 years, and if it's worth zero right now, $10K in the next 10 years ($1k/year). I also own a 2011 Nissan Xterra (wife drives it), bought 1 year ago for $18K. Original price $32K. $14K depreciation in first 3 years, probably about $1-2K in the last year.
I don't know if anybody quoted Dave Ramsey above (I scanned the thread, but didn't read everything) but he says something to the effect that "we all drive used cars. some of us just pay a lot more for them."
Another way of looking at it: let's say (for sake of argument) you want to buy a brand new Ford Taurus Limited. You can get one for 33,710. 2015 Ford Taurus Limited, $33,710 - Cars.com
Or, take that same 33,710 and you can buy a 2014 Lincoln MKS 2014 Lincoln MKS , $33,246 - Cars.com
or a 2011 Navigator 2011 Lincoln Navigator Base, $32,998 - Cars.com
or a 2013 Lincoln MKZ 2013 Lincoln MKZ Base, $32,995 - Cars.com
*Note: these are illustrative of my point. You can buy a nicer car at the same price if it's already broken in. I chose Ford/Lincoln because it is easily recognizable as standard/luxury line but could have illustrated it with Chevy/Cadillac, Nissan/Infiniti, Honda/Acura, Toyota/Lexus, etc.