What is the best vintage set to buy and break?

Having just sold my '61 set, I am looking to buy another vintage set. I would like to buy a great conditioned raw set and then possibly break it up or maybe get the best and key cards graded. What is the best set to do this with?
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<< <i>Did you sell it off of eBay? >>
yes
<< <i>what did you finally get for it. >>
$4500
Make sure you sell me the Horace McKinney card, though.
Finding one in great condition though may be a problem.
Steve