Probably more like $50. Not a lot of demand for the old stuff these days. For us wheelers it would cost a bundle to upgrade to discs and replace the axles with either later model stuff or chromo Longfield axles.
If you are trying to stay as cheap as possible I would shorten the longside to match the short side, then you only have to find anthor shortside axle. You might even find one on here in the classifieds. By the time you get your adapters and short b/s wheels it might be about right.
