Realcent.org

http://www.lincolncentresource.net/foru ... php?t=4481
Here is a link to only the 2nd inverted mint mark in the Lincoln Cent Series, the other is the 46-S.

I never think to check for inverted mintmarks...how much would that coin sell for?

This is only the 2nd lincoln cent to be found with an inverted MM. I have no idea what the price would be.
http://doubleddie.com/58306.html The 46-S was the only inverted MM until the most rescent find. I had just read that the 46-S with the ball serif was accidently punched into the dies upsidedown, so the inverted 46-S would actually be the correct stamping. The ball on the MM was supposed to be on the bottom. I have heard different prices on this in Unc. from $50-$100.