1968 Other Dodge Models Radiator

Engine problem
1968 Other Dodge Models V8 Automatic 280000 miles

I am trying to find a replacement radiator for a 1968 Dodge Dart. I have been quoted from $99-349. What would be a reasonable price for a replacement? I have the original radiator and it still works but since I replaced the engine block I figured I should replace the radiator as well. Would I be better off refurbishing it? Thanks.