Email Ebay seller, ask all the technical questions they should answer.

I received keys for my older car from Ebay a year ago, worked perfect.  But
never tried remotes since my old car didnt use any, and new car came with
two remotes and three key sets... too many so didnt bother to order more.

I've bought some from ebay for a 2001 sentra and a 95 200sx, both worked
fine.  Make sure you get the right one for your car (some look alike but
don't work the same), and get instructions for programming your car to
accept the new one(s).  Adding new remotes erases all the old ones, so make
sure you've got all your remotes handy when you do it to get them all
accepted.

Gary K