Where is it leaking? Some radiator shops can replace the plastic tanks on the ends, however you need to call around to find one willing to do so. The life expectancy of the plastic tanks usually is about 10 years. If it is the core, it is aluminum and basically not repairable. I fixed several plastic tanks over the past few years, including my own, over nine months ago using JB Weld and all of the repairs are still holding. If that is where yours is leaking, post back and I will give you the details on how to do it.
By the way, 200 bucks for a new one is too high. They go for between 135 and 155 bucks in my area.
Check RockAuto on the link below;
http://www.rockauto.com/catalog/catalog.php
RockAuto Parts Catalog
