Strip down, clean bearings and inspect for pitting, new ball-bearings, grease and re-assemble. You might be able to find new bearing surfaces if they are knackered.
I would be concerned about why the hub has been mistreated so badly, though. As in, if it's got a cracked flange or bent axle or something, and that's why it hasn't been maintained.
If it's pennies cheap, go for it.
Strip down, clean bearings and inspect for pitting, new ball-bearings, grease and re-assemble. You might be able to find new bearing surfaces if they are knackered.
I would be concerned about why the hub has been mistreated so badly, though. As in, if it's got a cracked flange or bent axle or something, and that's why it hasn't been maintained.