No update in 15 days...is USPS playing a joke on me?

I ordered a decal kit for my ATV off ebay (seller has impeccable rating) and the sale included priority shipping (2-3 days). I received the tracking info on 5/31, and it is now 6/13 and the info still says "Electronic Shipping Info Received." I asked the seller and he says it's normal, but I've never had them take this long. He's in New Jersey, I'm in Oregon. Any ideas on what to do?