Also do a search on 'Leaky Valve Covers", this is a fairly common issue, and usually not a show stopper.

If it's got warranty, it should also be covered.

A sure sign of a leaking cover, is to pull the oil splash pan, and look for signs of old dried up oil, caked to the pan.

If you look at the Valve Covers, both sides, and see some wettness along the edges, that's another sign.

Again not a show stopper, but if you notice, it should enhance your Buy Price, and eventually should be fixed...

Here's a visual: