Fun Fact From Mod 13 Changes

draconislupus

Prior to mod 13 you could buy profession resources from the vendor in 100 item stacks after mod 13 it went down to 99 item stacks. 1 isn't a big deal just kind of funny that they increased the buying quantity of some items only to have the system reduce (albeit very slightly) other items.

Personally I think the professions resources from vendors should be able to be bought in 999 (full) stacks.