Nice well used penny. If it goes to eBay I’d guess it would sell about $3-8 A nice saver if it was found for 1 cent, it’s a super winner for a hole filler A first year of issue, they were heavily saved over the years Not as impressive as that 1995 DDO you found
My "go to" way of distinguishing a proof is to look at the edge. If the edge is at a 90 degree angle, it's a proof. If it's chamfered, it's not.