Hello & Welcome Marcos- Your mother sure kept your cards in great condition!
I would definitely get both the Mantle and the Koufax graded.
I sold off most of my sets a few years ago...keeping only the 1954,1955 & 1956 sets...and I have since completed my 1953 set...and almost all the higher valued cards are graded.
Having higher value cards graded is the best way (if there is one) to assure they will retain their value or even gain some.
This is just my opinion, though...others more knowledgeable may not concur.
Have a great time out here...and never hesitate asking questions.
Lots of great...and smart folks here.
-Raymond
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"A life is not important except in the impact it has on others lives" - Jackie Robinson
“If you have a chance to make life better for others and fail to do so, you are wasting your time on this earth.”- Roberto Clemente
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