Cyclone, welcome to the forum!
$275 for that gun is a good deal, even if it's used. While that gun may have been bought overseas and carried back, maybe by a military member, we probably imported it, in which cased it is covered under our warranty. If you can tell me the serial number I can confirm it for you. It's a nice gun at a great price, but I should point out that it is not a Huglu. It is actually made by Kral, another Turkish company. It is produced in black and satin chrome, and ships with three (in some cases 5) choke tubes, which are Mobil chokes, the same standard used by Huglu, Beretta/Benelli and a lot of other manufacturers. By the way, I have heard of some compatibility issues with some Beretta 20ga guns. As far as I know, Beretta made a slight alteration in the threads on those guns in some model years so that they are not always compatible with other mobil chokes. Can any of you Beretta shooters shed some light on this topic?
As far as the warranty is concerned, we cover any gun we import for five years, regardless of who owns it. We don't actually cover guns that are older than five years, but if you do have an older gun and need service, parts or advice, we will certainly try to help you. If you ever have a question about a gun's history, just tell me its serial number. That way I can tell you its warranty status before you buy it.
As Strat says, I'm out of the country until next week, but every couple of days I have a few hours to jump on a computer, so if you have any other questions, post away.