I took my '02 Subaru WRX in to the dealership to get the brakes inspected, and they told me I have leaky valve cover gaskets, as well as a leaking DOJ seal on the front passenger side axle. The repair cost quoted for these repairs was almost $700...are these things that need to be addressed immediately, or should I check out another mechanic? I have never seen any oil leak reaching the pavement underneath my car, so I'm doubting the severity of this issue, besides the fact that the dealer always seems to find some problem that needs over $500 in work that no other mechanics seem to notice. Let me know what you think....Thanks!!