Places like that normally sell the guitars to anywhere in the world. Then are just a 3rd party seller. The items are usually for sale in Japan only. Or some times for sale in Japan but selling worldwide. Say they are $1000 in Japan from the original seller. Then the guy on Ebay sells it for $1900 but does not have the item in hand. When someone buys it from him on Ebay he buys it from the seller in Japan for $1000 and sells it to you for a $900 profit. So this is why they just end items like that. Or why you may purchase it from him then he says he no longer has it.
Anyways, I bet that Greco is probably poly. You can get a nitro Tokai 335 for probably the same price or a bit less. IMO the Tokai 335 would be much much better than the Greco. You can also get a New ish (2000+) History (Fujigen made) 335 type guitar for in the range of $400 to $1800 or so depending on the model. This would also probably be as good or better than the Greco you were looking at. I have a 2004 History ZSA-CFS/LBS that I paid about $500 or so for that is a great 335 guitar. Made by Fujigen. It is a Poly finish. If you want to pay more you can get a nitro one. They are really good guitars. You can check buyee.jp to get a good deal. Check all their sites under buyee yahoo japan, rakuten, yahoo shopping sometimes.
The ZSA-CFS/LBS model is the 335 model Fujigen was making for Epiphone in the early 2000s. They only made it for a few months. Gibson got mad because there were at the time making them better that the USA made Gibson 335s. So, Gibson stopped using Fujigen to manufacture the Epiphones.