Get an estimate from a local painter and compare them. Normally the factory finish is less than job site.

Whatever you do, don't hire the painters the previous owner of my house hired to paint the windows:

Read lots of reviews of local painters (if you go that route) to make sure they don't take shortcuts or do sloppy work on jobs that require a bit of carefulness (like windows).

That price does ea seem high, is it a standard Marvin color or custom color?

wYoy may ask the dealer if there was is a local company that would do this. There is a company in my area that specializes in this type of wirk.