opinion, Should I grade

[blindguy]

I have quite a pile of proof libertads, koala, kookaburras, kangaroo, Isle of Man gold cats and other proof coins. Most all are in the OGP. I have been thinking about sending them in to NGC for grading but wonder if it is worth the expense?   What do you think?

[Kman]

You would need to research every coin individually, what extra value (if any) it adds to get a high grade, then work out overall costs of grading, posting, selling fees etc and see if it's feasible 

Also helps to have experience grading and judging condition of coins to send off

[Abyss]

Jim, I don't have a single graded coin but IMHO grading silver is not worthwhile. Grading Gold that has historical significance is another matter. @Numistacker should be able to offer better advice because of his involvement in grading and coin auctions.

[kimchi]

Gold proof Libertads for key/valuable years yes, absolutely (and if you get 69s think about resubmitting, perhaps with conservation, perhaps break out the slab and just send 'nude' if you see no imperfections under 6x loupe) - I'd leave the rest myself, can't see much uplift, but I really don't know the market so I am shooting blind there (i.e. don't listen to me!).