Absolutely... I am definitely not dismissing Chris' message. I did as you suggested and googled "kaneyasu oshigata" but either I missed it or there isn't a page with that information. Is Grey's image above the oshigata for Kaneyasu? Also, unfortunately, I won't be able to view it until right before I can buy it. Hopefully I'll be able to get it for "cheap" (a couple hundred bucks) so if it is a gimei then I won't be too disappointed.
Even if it is gimei, could it still be a well made nihonto? From the short time I was able to handle it, the blade seemed to be well made and in relatively great shape (minus some rusting and pitting). The lines were sharp and straight, the kissaki was not damaged and there was only a tiny little nick in the blade. The hamon was easily seen but I couldn't make out more details (mainly due to my untrained eye). The current owners have no idea how to take care of the sword so at the very least I will be rescuing a sword from assured neglect.