What makes you think they depreciate less?
A R34 GT-T has gone from what, 30k or so 4-5yrs, to 20k or so. You can get a R33 GTR for 20k even.
The fact it's N/A - even less. Look through the FS section, car sales etc. Nobody is selling easily these days unless its rare.
Take a Porka Cayenne or a BMW 335i, both have dropped 40-50k off their sticker price in 18-24months.
Whatever car you buy, forget about resale values unless it is rare. It's been this way for a number of years now.