2005 Chevy Impala New Tires with Alignment

I am getting new tires this Thursday; and then I called another place to have a front end alignment. They told me that because this car is a front wheel drive, I should also get the rear aligned. $45.00 for the front; $45.00 for the rear. Is it necessary that I get a rear end alignment??? I've never been in an accident. The only problem I see is that it's wearing the one tire on the front drivers side.