What would be the estimated price to paint my silver car a darkish gray?

From this silver:


http://freerevs.com/pictures/524288.jpg





To this gray:


http://assets.clickmotive.com/ail/color_0640_001/5409/5409_cc0640_001_K36.jpgWhat would be the estimated price to paint my silver car a darkish gray?
wahts the point of painting it another color


theyre so close in color..





3 grand for a halfway decent one

myspace pics