Looks a nice sword, but you may have lowered the value now buy trying to clean it. A lot of collectors including myself like the untouched article, or as was in its natural state as found. Has the blade any detailing/etching on it. The value, without seeing it in the flesh as they say, should still be anything from £50 to £70 may be a little more. If it had been in a little better condition with its scabbard, could of got about £160 odd for it, That's what I paid for my last one which looks similar to yours.
Regards Steve.