In addition to a few items always available, there is a small random selection of items you can purchase for Silver. Many of the items will be superior versions of themselves, adding prefixes and/or suffixes to the item's name and providing improved stats.
Most items in the Shop, including Deals and Peerless gear, are available for Gold. When purchased with Gold, the item becomes permanent and will remain with your character through all subsequent reincarnations.
Currently in the ShopEdit
Always in the ShopEdit
These premium items randomly appear in the shop (the list might be incomplete).