How much is a 2009 penny with no mintmark?

no mint mark meens it was struck in philly. This is a newer coin and exact price its worth varies. it depends on what version of the 09 you have and condition. If it is in perfect uncirculated condition as of now I have seen them go from a few cents to well over a dollar. There is high demand for these now since they were a one year series. I think the 09 price will go down a little and jump back up in 10 years. Hold on to all the 09 pennys you can and keep them + look out for the D (denver) mint they are rarer. Just a heads up the new 2010 pennys with the new design are out and I have seen them go on e-bay for $7 for one penny I dont think many will get into circulation. Keep all your 08,09,10 pennys they for sure are worth more than a penny.