Should I sell them or give em to Goodwill?

I have about 3 Pittsburgh Penguins jerseys and I got a Kris Letang Winter Clic one on its way so i'll end up having 4. The thing is that 2 of the 4 jerseys are medium sized and I wear a large now but I still wear the medium ones sometimes. What do u recommend I do? Should I give the 2 medium ones to Goodwill or hang on to them?