Brand new in original sealed polybags. This set comes in sealed bags like Lego, but without a printed box (as you can see in the photos). 

Keep in mind this is not authentic Lego (which is also why this auction is not for $5000, which is what this set costs in real Lego). In my opinion though, these look just as good. Unless you look close enough to see there is no "Lego" stamped on each stud you won't see a difference. I have the same exact set mounted on my wall and everyone thinks it's Lego.

For the sake of honesty though, these generic sets do have their own quirks. For example, almost every set of this size will be missing 2-3 pieces. These are easily replaced from your own collection or from BrickLink for a buck or two. I have confirmed that all unique and hard to replace pieces (ship rigging, radar dish, etc.) are there, so if anything is missing it will be cheap to replace.

There is also a known issue where the landing gear doesn't always fit snuggly and can fall off. A small bit of putty or rubber cement fixes that easily. This is not the case for every set though. My personal set that I just built fits perfectly. 

So yeah, not perfect, but for less than 10% of the cost of the real set this is still a steal.

If you want a full review of the set (issues and all), check out this blog post.

Please note: The photos of the set in this listing are from the review posted above and not my own. The photos of the pieces in bags are what you will receive, however the finished product will be identical to the completed set photos once you build it.