What’s the value of this coin from the 13 Colonies?

Not much, in this condition, I am afraid, but maybe I am wrong.

https://www.ngccoin.com/coin-explorer/united-states/colonial-period-1616-1775/other-issues/108097/c.1694-thick-elephant-god-preserve-london-token-ms/?des=ms-bn

Is it on numista?

It is not.

This one sold for $400 in 2014:

Should I get it graded? Even though the condition is horrible 

If you plan to sell it. What would be more important than the grade is the certification of authenticity that comes with it. The one I showed that sold for $400 was graded a 2. Not sure how the WW would be handled since it's technically damaged.