With the world being so large, it'd be neat to see merchant carts in some of
the farther places. What if merchants got one (or both) of these options:
1) Ability to buy extra carts, each additional cart costs more than the
previous.
2) Ability to link carts to extra places...one cart+inventory, but allow it to
have one or more interdimensional counterparts...i.e. ability to place the
same cart at south cross of arelium AND near rilynttar...item bought from any
of them subtracts from the inventory of all.