If it is minted with a D on it, there were only 100 made in a test and they were made of a different material. The last one sold at auction for like 100,000 I think. If it has got no D on it, it is worth about 3 cents.
A 1945 penny has some value but not much between $. 25 and $5. 00 and $ 5. 00 is very high. You can sometimes raise the value by having it certified this will help you sell it on a omline auction such as ebay to. The longer you save the greater the chances that it may go up in value.