Depends on where you live but usually peking duck is the best bet at a chinese place. Plus that stuff is probably one of the best dishes on the planet.
Chickens are more expensive here because factory farming doesn't exist on the same scale as in the US. This is coming from an Arkansas boy who grew up around tyson chicken plants his whole childhood. A roast chicken is something you do for company or for the big family meal on Sundays, and so the market can bear a little bit more cost and a more well-raised bird. We never buy anything less than Label Rouge chickens, which is part of the appelation for how chickens are raised.
http://fr.wikipedia.org/wiki/Label_rouge Typically they're free-range corn-fed chickens. Most of the grocery stores here sell the mass-produced stuff as well, and it comes in the standard legs only, legs and thighs, etc type packaging. Lest you think I'm Mr. Moneybags, when I buy wings I get the cheap stuff, I paid about 30 euros for enough wings for 20 people which is a pretty good deal in my book.
Also I've noticed that French people, and by that I mean what my wife cooks for me, eat a more varied diet than what I had in the US. Sometimes I've gone a week without having any red or white meat. Although there's usually bacon.