Who thinks that? Everybody knows cars are loosing value day by day, so I really wonder who you are referring to. Stating the more-than-obvious is not impressive at all.
I'm only stating it because american cars depreciate very fast and anybody who buys american brand new doesn't realize that waiting a year can save them thousands, thus enforcing the idea that buying brand domestics is dumb. If i were forced to buy a brand new car it wouldn't be american, but buying it used I wouldnt mind.