I saved them, then put them back on when I traded bikes.
Then sold the Mufflers I took off for $300.
So if I had trown them away, I would have been out $300.
Stockpipessuck.com, I won a complete exhaust off a 2011 S/G on ebay for $65 and stock pipesuck gave me $75 for the mufflers Go to their website, they have p/n's lsted for what they will buy back.
I sold mine this way you pay shipping which was about 20 or 25 bucks USPS.
still better than ditching them I mailed them out and got a check about two weeks later. Check the web site for the part numbers they are looking for.
I sent a couple sets in to them today. Hopefully I will see some cash. Keeping them for reinstalling at trade in or for a noise inspection would be a waste - see sig. Thanks for the heads up about the website