Dynomax 4" Exhaust system

I have for sale a Dynomax 4" Exhaust with open flow muffler. Came off a 2002 Ford F-350 crew cab pickup with a 7.3 Powerstroke. I only used it on my pickup for 2 years about 20000 miles of use, then took off when I trade in 2005 and it has been sitting in my cold storage ever since. Sounded good, not to obnoxious half as loud as a straight pipe.