The same sword is on sell also on ebay for a "reasonable" price
http://www.ebay.com/itm/VERY-RARE-Japanese-SAMURAI-SWORD-Katana-MURAMASA-1st-Hitatsura-w-Sayagaki-/201017336921?pt=Asian_Antiques&hash=item2ecd912459
I've many dubts about this sword, the mei is surly gimei but i don't think it's a shinshinto blade becaose aren't totaly
visible the yasurime. Is it older than shinshinto?
The tsuka wasn't namban but probably beginning of 20th, the fuchi and the kashira was dameged, the blade now is stored in shirasaya, and all work is made by a togi.