A new screenshot from Target has leaked showing price drops on its iPhone models effective Sunday, July 31. The price of the 32GB iPhone 4 would drop from $299 to $269, while the 16GB iPhone 4 would drop from $199 to $169. Finally, the iPhone 3GS will be lowered to a price of $19. There is still no word from Target or Radio Shack confirming or denying the rumors, but we hope to find out soon enough. It is unclear whether other iPhone retailers will be lowering their prices as well.