Helpful note for those looking for resources, the credit trainer option will increase count of items/minerals sold at a merchant to 1000000 when you sell that item to the merchant.
So if the merchant has Iridium, and you buy two of that item from him. Then sell the two units to the merchant, one at a time. After the second sale the item count for the Iridium will increase to 1000000.
Also, this works in reverse for increasing your quantity of items to 1000000 as well. Just buy two single unit transactions of the same item.
Just make sure for all of the above, the quantity of the item you are trying to increase is on screen.
[Edited by myrmidon, 3/20/2017 6:34:37 PM]
I've noticed similar things. I have a bunch of materials/resources now but still need to find some of the rarer ones. Also some of the materials are maxed out (at 70 for example) and not at 100000 like others... strange.