I'm on the fence here, but I think I'm going to agree with Matt. Get the Mantle. There's no Ruth in the '34 set, and you haven't acquired either of the Gehrigs yet. The cards you have thus far should be easy to replace.
Do you have any candidates in mind? If you ultimately decide to buy a Mantle, before you put down any money, make sure to get high quality scans-front and back-to post here. I want the experts to look at the card you'll be buying to insure that it is an authentic card.
Good luck!
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Building these sets: T206, 1953 Bowman Color, 1975 Topps.
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