I don't think I'll ever find myself in a financital situation where I can afford to purchase Chanel pieces that I can wear for only a season. The "Chanel Suit" though, is one of a few Chanel items that I am willing to invest in as it'll be something to wear and to love for many, many years.
"[Coco Chanel] had numerous other major successes that changed the fashion industry, including the ever popular Chanel suit, composed of a knee-length skirt and trim, boxy jacket, traditionally made of woven wool with black sewing trim and gold buttons, worn with large costume-pearl necklaces." (Wikipedia)
Here are some from the Chanel Fall 2009 Paris Show.