in Buy/Sell and Lost/Found

I bought this stem back in July and have recently replaced it with a shorter stem.  The stem is in great condition, it has an aluminum body and a carbon face plate. $30 or trade, looking to upgrade my brakes but will consider anything.
https://madison.craigslist.org/bop/4808513786.html

I also have a black unbranded 100mm stem for $20