I personally think that's a rip. At 30K, oil change, tire rotation if you are due, and maybe transmission fluid change depending on whether you believe it should be changed when dirty (see other threads in this forum for more debate on that). For those three things, you should be around $200. Also, probably air filter and cabin air filter if you have not changed those (do it yourself for under $30 for both - easy to do).
In any case, $429 for whatever they are going to do seems steep to me.