I'm gradually working my way through about 350 shirts. I've sold quite a few 80s tour shirts,but there's more to come. Not just proper metal,but early (1988 etc) grunge,punk,hardcore etc.
Humus(on here) from Belgium can vouch for me.
Just added:
-Pagan Altar. The time lord shirt.Official through IHATE records in 2004
-Witchfinder general. reprint from mid 90s
-Mordor (ch). Life is nothing. rare shirt from mid 90s