'43's are often plated... and man, do they shine! Usually sold in 'lots' on eBay to be resold at flea markets, etc. Here's what they look like: http://cgi.ebay.com/LOT-20-1943-STE...70?pt=Coins_US_Individual&hash=item3a51b4fe02
You paid a buck... that's what it's worth to you. Keep it and enjoy it. Here's a similar coin on eBay, but it's a tough sell: http://cgi.ebay.com/1943-BU-Uncircu...09?pt=Coins_US_Individual&hash=item23111a3675
That is why we collect and chase after coins. :smile A buck isn't really a bad price for that coin anyway. Most dealers will mark them from a dollar to $1.50.