You have found your man. The sword will likely have a hamon, though not a good one, but it doesn't show due to the condition of the blade, it may be that someone has polished the surface, a different sort of polishing than the type you will hear about hear and one that masks all detail in the metal. I am guessing that you are in the US. You have found Richard Stein's site, have a look here http://home.earthlink.net/~steinrl/sites2.htm
for relaible restoration services but be aware that to properly restore the sword will cost a lot of money and the sword will not repay that investment. However anyone offering cheap restoration will probably do more harm than good. It might be possible to have the hilt restored and leave the blade alone, in which case simply wipe the blade with a light oil to preserve it.
In any event you have not paid too much for the sword and it might be the start of a fascinating hobby if you are interested enough to pursue it. I would reccomend lots of eye candy by looking at the swords for sale on the websites in the link above, you are in for a treat!
All the best.