Just recently I went through my mom's coin collection she had hundreds of Wheaties. I decided to look into the fact if they were worth anything. If u do a google search for "value of coins", I belive the second site on the
list is Price Guide -PCGS, and u can look up every year that was made and where it was minted. Some of the dates will list a time where that coin was once auctioned. I was amazed with how many of the lower dated Wheat pennies went for $600 to over 2K in some occasions, I believe the price differences were due to condition of the coin.