Is there any way to preview the items yet besides buying them and previewing in the bazaar? It would be really nice to preview before I buy so I can know what I want and which helmet, etc I want it on. It seems like this is a very easy thing to know that people will want. Is it just laziness that a better previewing system was not created?
There currently is no way in the game to preview the accessories without having them in your inventory. You can check the Wiki for them, but it's not guaranteed to be there.