Timing belt estimated price is $1500 but here its $700, help? on 2007 Chrysler Pacifica

Ok so I need to replace my timing belt before it gets to late, but the price I have been giving is WAY to much according to this site, they are wanting 1500 for a 330-800 dollar job... I'm not sure what to do, but its past its recommended replacement time, I need some advice, please help.