Aoi-Art watch it with the koshirae too, almost $20.000.
I've been researching the past few days and i've learned many things about katana's. The biggest thing was that certificate, consigned ones, that NBTHK approved, Japan considered their katana's with such value that they have restricted their export of katana's, the goverment or NBTHK, that contradicting the export of katana's must approve your export before leaving the country with it, you can go to jail for that... And we're talking about older katana's from 13th century til 19 century...
I didn't know there was such things about katana's now i really know how to recognize a authentic katana... and the price, geez! it's alot!