I am going to be taking many pictures of moving vehicles, it will be in the daytime, and the cars will be moving at about 50-75mph. Is there a good camera for this? I have a spending limit of 500 dollars, and would like to go cheaper. I am fine with an older model, and I dont need many MP, just enough to get an 8x10 picture. All I need is a clear picture of the vehicles in motion, my current camera is horrible. Thanks.