Looking for direction to a place where I can interact with a fan base of dicemasters for the purpose of trading, buying, etc. pm me if not ok to reply here.

if this post is against hcr rules, please close / remove / as is appropriate.

We have our own Dice Masters section of the forums with our own marketplace. Check it out:
http://www.hcrealms.com/forum/forumdisplay.php?f=264

I've seen that, but there are just not enough people posting there. Must be a place with a bigger group of traders of this game.

sadly that is all the dice masters players that exist in the entire world

My suggestion would be to look for a facebook group or start your own website to gather all the dicemasters players out there.