hey guys I already owned a samsung sl420 the program mode only let me adjust the iso and exposure. Is there any camera under $200 with full aperture(real full range not just a couple of values ) and shutter speed?

Also, why are most cheap digital camera dont come with full manual control? is it because of price ? or are the companies worried that people who buy a cheap digital camera doesnt understand how to use them correctly? I think it is the latter but i just want your opinion on this. thanks.