Change domestic shipping to international if Item is set for domestic but bought international?

[gamepowershop]

I've never shipped internationally before, so it's my first time delving into this topic.

I was auto-enrolled in eBay International Shipping a few days ago, and the item in question has been subsequently made available for international shipping. I received an offer, but I'm afraid if I accept it, my item will be restricted to USPS Standard Shipping as I first set it up for domestic. Will I have an option to change the shipping to an international option if I accept the offer?

What if I accept it, and I'm stuck with domestic shipping as an option, or have to pay out of pocket for an international label I didn't initially set it up for?

[gamepowershop]

Also, can I send the item to eBay's domestic shipping hub so they can do the customs work? It's been advertised as such, but I haven't tried any of this.

[gamepowershop]

Actually, I checked my listing's revise option to see how I set it up for shipping, and it does indicate International Shipping options besides my domestic option. It says "Simply ship the item to our domestic shipping hub and we’ll handle the rest - at no extra cost to you.", so I'm assuming the option to ship to the hub will be available if I accept the offer from the foreign seller.

[stainlessenginecovers]

That is EIS (Ebay International Shipping). 

You simply 'ship' it to Illinois. 

Nothing different than if a buyer in Illinois purchased your item. 

Only difference being: Did you input, on the listing, prior to it being purchased; the 'Size' and 'Weight' of the item.... so the buyer is charged correctly? 

[gamepowershop]

Thank you, I make sure to pre-package my item [without sealing it] for the approximate weight and dimensions before listing it for sale. Basically just putting the item in a box or mailer with padding materials and weighing it. I always want to be absolutely sure of what the intended shipping options are.