Cost to Repair/replace side mirror? Clanging noise under car when starting up. on 2005 Pontiac Vibe

My side mirror is loose and the mirror itself got scratched up in a car wash. Cost to replace or repair it? Also, there's a rattling/clanging noise under the car when I start it up, but it goes away after I start driving for a few seconds. Could it be a loose heat shield? If so, what's it cost to repair?

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1 answer 2 comments
if the mirror is not electric should be fairly with your local salvage yard or on line. yes it could be your heat shield cost to repair like 20 bucks
The mirror is electrical.