Here is a 2001 off-center-strike Lincoln cent with indent. Because the radius of the indented area does not match that of the planchet itself I believe that the shape of the indentation and how extremely thin the planchet is in that area suggests the possibility that this could be damage from the feed-finger which would make this coin very rare but there is no certainty of that explanation.
The item "Lincoln cent rare error coin" is in sale since Thursday, November 30, 2017. This item is in the category "Coins & Paper Money\Coins\ US\Errors". The seller is "worthashot101" and is located in Boynton Beach, Florida.
This item can be shipped to United States.