Zippo Lighter

I have a Zippo lighter my dad bought for me back in 2000. It is a zippo lighter that doral did as a special offer for that year. It came in a set of four and he gave me and my three brothers each one and i lucked out and got the one with a picture of New York City on the front with the World Trade Centers in the background. It is still in the original case it came in and has never had a drop of fluid put in it and I was just wondering, if anything, what it was worth now.

                                                                                                                 Thank you,

                                                                                                             Jerimiah Smith