I just see the "one of my students" in the original post. I am a professor at a university and I would NEVER tell my students I collect coins. I "trust" them but.....not something I want to advertise in any way at all. My wife works at a university with a lot of foreign students from a lot of different places and she can get me a lot of interesting stuff, but it isn't worth it to me. Last month she brought me a Jordanian Dinar and thought I'd praise her efforts, but I scolded her!! Hmmm.... love the wife's thoughts but....can't go there.