I was at the Luxembourg show last sunday with Arturo,
it's a small show ; and it depends on what you collect and how long you collect if it's interesting...
but there was much "schmuck", stone-birds, gems etc, and only two/three dealers with interesting minerals
Fanelsa from http://www.mineralbox.biz/
had interesting specimens for a good price, he was worth the look
but I went out without buying minerals. The lunch with Arturo was much much better afterwards
That should sum it up ;)