Ask them about keeping the inks. My first 3880 came through with issues and they told me to keep the extra set.
Also, Epson will ask you to ship your original printer back with the inks in place. Before you box up your original printer use the inks for the initial line charging of the refurb, then replace them in the original printer you are returning. Then install the new set of inks that came with the refurb in the refurb and you wont have the cart levels sucked down by the line charging. You might as well also swap the waste tank while you're at it.