New Koetsu on Ebay from Japan???

I've never required a warranty but it happens take a look at this thread on this forum.

Brand new Lyra Delos - skewed cantilever

The value of the warranty with Koetsu is that they will rebuild the cartridge in its entirety, keeping the original body. This may not make sense for a 4k dollar cartridge, but at a certain point, it is a fraction of the cost of the cartridge at retail, particularly in the U.S. Thus, when buying from overseas, it does have value to make sure the cartridge is from an authorized dealer if they are not fly by night and can send the cartridge into the factory. I’m not against third party retips but as everyone knows, the factory rebuild will have better value than a third party retip no matter how good. (I’ve read about a couple of retippers who have done Koetsu where the claim is "better" than factory, but I’m not sure that’s always the case). In any event, that’s the value of the warranty. If you have a stone body that is worth 13k plus in the U.S. market and can get it rebuilt for say, 4 grand, you have something of value.

I have two stone bodies, both U.S. authorized. I’ve had one rebuilt.

i have had no trouble buying japanese cartridges from ebay sellers

as always check feedback... extensive good feedback cannot be faked... ask questions on warranty and how a defective item would be dealt with before buying

there was a time few years back when audiotechica art 9's were not widely available via usa retailers, i bought two through a japanese seller on ebay... it worked out perfectly 

Juki is well known on Ebay and has been around for a long time. Like others indicated, no warranty and maybe even gray market without serial number.  The risk is yours.  However, savings on a stone bodied Koetsu can be significant (greater than 50%).  Link below may not work due to Agon's goofy format - if not, search for 2juki-cartridge on Ebay.  Hope this helps.

As to the potential value of the factory warranty, in my case I found when I got back home in the US that my Koetsu Urushi  had a deviated cantilever. I sent it back to the dealer in Tokyo and got a new cartridge with absolutely no problem, because I had the warranty. Of course I needed the help of my son as translator, because no one at the dealership spoke any English. 12 years later, I recently had it retipped by Expert Stylus, and if anything it sounds better than ever.