Unless your 101% certain you can cosmetically restore it to a degree that an "expert" couldn't tell it was cosmetically restored , I'd leave it alone and repair the internal electronics only , and only to the degree it needs to get it running . Like you so rightly said , where most of those are "absurdly priced" I'd even consider restuffing the caps to preserve it's original internal appearance . In the future the "patina" and slight cracks will be seen as signs of it being a survivor , whereas a badly done cosmetic restoration will DRASTICALLY reduce it's value .