A new iphone

Apple offers either new or refurbished iPhones from their online store. You would have to specifically go to their Refurbished Store for used models, otherwise they only sell new models at the online Apple Store.

You will also have to shop at the specific Ireland Apple Store as Apple does not ship to other countries. For example, if you try to purchase a phone at the U.S. Apple Store, they will not ship it to Ireland. Any phone differences would be based on that countries requirements, otherwise the phones will be nearly identical.

Where are you getting this phone from? If it is from an Apple Store or authorized reseller, then it would be a new phone. If from an individual, then it will be second hand. There is no international version of an iPhone. An unlocked phone can be used in another country.

Who are you purchasing the phone from? Are you buying a phone second hand?

Maybe if you answer our questions we can. We're not mind readers here.