I'd call this a rare opportunity to own a long ubu Kamakura tachi.
The sword is ubu, and with a nagasa of 81.5 cm (32 inch) it has an imposing size. A Hoju school sword that has been awarded a Tokubetsu Hozon by the NBTHK.
This is not an art sword, but a formidable weapon and a rare specimen of an ubu Kamakura tachi.
The Hoju school from Oshu (Mutsu) has been producing highly functional weapons which, unlike other Japanese sword, withstood the harsh coldness of Northern Japan. The sword retains a grand sugata, although it has had it share of polishes, and it displays all the characteristic o-hada of Oshu-mono, the most visible of all being the standing out, large hada (o-hada, hadatatsu). It feels very heavy in hand. It is very likely that the nakago had originally a more pronounced curve so that the koshi zori was deeper. It has likely been hammered back during the Muromachi period (a theory of a Japanese sword smith who has seen this blade)
The hada is somewhat coarse, as is typical for this school, and there will be small tate ware here and there, but nothing that detracts.
The sword comes in a Japanese shirasaya and an old one piece copper habaki.
My pictures are pretty bad, but at least you can see the hada and some parts of the hamon. In one of the pics you will see the tachi together with another Kamakura sword - a suriage daito with a 70 cm (27.5 inch) nagasa. That should give you an idea how long this sword is