Hello Brian,
Here is my opinion. It is a decent blade on it's own, with no major flaws and seems honest. It is a genuine antique Japanese sword. Is it worth the asking price? Not really imho, especially when you include the cost of shipping/fees. The paper with Japanese writing that is displayed in the photo is a registration certificate, it is required to possess a weapon in Japan. They are not authentication papers (NBTHK) on their own though.
You can find NBTHK papered swords within the $1,500-$2,500USD range, so it would be more worth it to buy a blade for around the same price that comes with papers. For that reason, it's hard for me to recommend this blade at this price for someone new to the hobby. Just to compare:
https://rva-katana.com/collections/antique-swords?filter.v.price.gte=&filter.v.price.lte=&sort_by=price-ascending