Just an example of a worn out die that struck your coin. The reason the devices are looking longer towards the rim of the coin is from extreme die wear. The '6' is showing an broken hub. That is why the bottom of the '6' id missing. No premium for this one. Just a Wheat cent to add to the wheat pile.
That's cool. I have yet to find a BIE out in the wild.
As for pricing, check out the sold listings on ebay or other online stores. You can't rely on listing prices because people can ask for whatever they want, but the sold listings will tell you what buyers are actually willing to pay.