not everyone is going to be jumping from world to world to buy stuff.

it will likely be just select few people, not only that this will give worlds that normally over supply their economy supply others as well.

people will buy from cheaper worlds just to try to make a profit on theirs as i had said there are people who aren't going to check the price of every world on their data center to get the best prices.

over all yes at first things are going to heavily change due to all items that are rare getting mixed together because players are going to try to make a profit from it but after it all settles down things will be all good and prices all around will be steady and chances are a bit lower than they have been.