What Should I Know (or Ask) During A Carpet Installation ?

What should i know to avoid being scammed or over charged for a new synthetic (debating between polyester & polyester nylon) carpet & pad for a Living room & stair case.
What is the average amount of additional carpeting needed?

Empire Today Carpet! Need Help?

i had empire give me an estimate on a carpet. the sales rep. said i need about 250yards of carpet, he quoted me a price of $8760.00, on nylon carpet with nice padding! i dont know is that a good price i need the carpet asap??? anyone know any info about that company if it is a bad or good company and if the price good!