I have only owned one 20 cent piece in my life (14 Y.O.) but I couldn't say no for $15. It has some X marks on both sides but I think mine still grades VG-F details. It is a 1875 S.
Here's mine, a bit abused but I can't complain as I got her along with 2 1834 bust halves, an 1858 flying eagle cent, an 1853 seated quarter, and an 1876 seated half. Only paid $50 for the lot and only for type coins anyway.
New purchase looks a ton better now then in the pic as an acetone soak got the crud off but I haven't re photoed it and I'm not home
Here's mine. Again the common 1875-S. This was the first slabbed coin I bought when I re-entered numismania a few years ago.