When I first got my car last march I just needed her on the road....so I ended up getting a MC from autozone.
even with the core it was relatively cheap....$16 no core ....(drum /drum car)...
I am redoing my brake system and ended up buying a more modern all aluminum deal from drdiff on ebay. $100 or so.
Depends on what you want to do. I figure the newer style is less likely to develop a leak with the caps on the reservoir rather than the whole top coming off.