Is This A Fair Price For Carpet Installation?

I live in the Columbus, OH area. I received a quote to install Mohawk berber carpeting and premium pad in our finished basement. The area is about 200 sq ft, and the price includes removing and disposing of the old carpet and pad. This also includes installing carpet on the stairway. It is a “floating” stairway (with steps only, no risers), so each step will be individually wrapped in carpet. Is $815 a fair price for this job?

Where Is The Best Carpet Installation In Westchester, New York?

This is for a large bed room, about 270 sq ft. (26*11). Where is the best carpet installation place in Westchester, New York?
I got a quote from a local carpet place in Mt. Kisco, NY. The name is Suburban Floor. Does any one know this store’s reputation? They gave me a quote for $1,270, which includes removal the existing carpet and install new carpet, Mohawk brand, Sensational styple, 40 oz synthetic hair and jute padding. Is this a good price? Can I use the existing padding? If I do, the price would reduce by $100.
Should I look into other companies such as Empire today, Home Depot and Lows? Any other suggestions?
Also, the carpet is about 6 years old. What is the average year that bed room carpet should be replaced?