Running a water line for the fridge…

So I just bought a new fridge and I need to get a copper water line ran to it. I had a plumber today come by and quote 330-350? I think to do it.. It seems a little pricey just for one small copper line….

Just curious if anyone would shed light on the cost and/or difficulty to do this.
well, we got a new fridge last year and installed it ourselves (seemed easy) but then water went everywhere

we just got a good friend who knows plumbing to do it…he was done in less than 5 minutes