I just sold my '78 spit for $5200 Canadian, and B's go for much more than that out here. Most $5000 B's whether they're in Canadian or US dollars will still be projects, I reckon.
You might be able to find a rubber bumper B for that, but they're not cheap either. Still, deals can be had if you can find one before it gets advertised.
My spit was in very nice shape, with a mediocre respray, no rust ever, but still needed things done like differential, tranny leak, interior redo, etc...