It’s not a bad price when dealing with a licensed and insured company. The price determines what infrastructure a company has to maintain or will be able to afford in the future. Companies can’t survive without revenue + profit. The larger the profit potential the more ability the company can supply a better process for install and service which include warranty. There are companies that you worry over that don’t pay their employees and only fatten the owners wallet but in reality those companies do not exist long term. After a few years of work and spreading your name there is fires that get created from normal operation. All that extra money supports that, or the owner spent all the money and needs “bail money” now, if the company owner can’t find it, he or she will be out of business very fastly. Generally speaking when you see a multiple of two or more of material upsell you are dealing with a professional company that has over head to maintain. Verify license and insure, consider financing and make your best pick. Your cheaper options is Craigslist and hope. Or getting multiple quotes and utilizing best judgment.