I know all about minimum orders.
At work we asked to be a Sideshow/WETA dealer. Sideshow does busts and statues for Lord of the Rings, Movie characters, comic book characters etc..
Their minimums are 25 of every items that comes out, the few good ones and a lot of shelf warmers.
They really don't want dealers because it more money for them. Cut out the middle man because they sell out on their website on all their popular and hot items.
All I got to say about the Dust manufactures...small time operators 
Why sell to you wholesale when they can sell off their site for full pop.