I think the price will vary by region. Best thing to do is get 3 or 4 estimates and pick the one you like best (not necessarily the cheapest). Get references and look at their product samples to make sure the quality is what you expect. We replaced all our old single pane windows/storm windows with zero maintenance vinyl clad. If you are going to be there a while, get the best quality you can afford.

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1985 380SE Blue/Blue - 230,000 miles
2012 Subaru Forester 5-speed
2005 Toyota Sienna
2004 Chrysler Sebring convertible
1999 Toyota Tacoma