The OEM mufflers are(were) ~200 left side and ~$700 the right side. The right one is one piece from the cat (includes the silencer) hence the price.
But I mentioned WERE, since are discontinued for LONG LONG time.
Your only option in the aftermarket word is Walker quiet flow, they make direct fit mufflers for ~$120 (check rockauto.com). It should cost maybe $80 to have them installed, add tax and you end up with a total of ~$350.
Now the aftermarker mufflers are way less than the OEM so expect little less in quality. At least are not loud and do come with the tips.