Raw chicken is going to have a slight smell, depending on the processing and how it was handled by the middlemen before you got it. This is just a type of bacteria that is giving off the odor. Go ahead and wash it thoroughly under warm water, which will get rid of most of the bacteria. Then cook it thoroughly, which will kill the rest of the bacteria. Bacteria and chicken are just a fact of life in how they take the feathers off the chickens. The smell will go away pretty quick. So don't worry about it.
Well certainly, you should not eat it! Raw chicken over a period of time will develop a repulsive sour odour. If you think the chicken was expensive and decide to eat it, you may soon have to pay hospital bills too. Never leave raw chicken in the refrigerator for more than 2 days or in the freezer for more than 6 months. Keeping the raw chicken beyond this period can contaminate the chicken and make it unfit for you to eat. You will not only be able to 'smell' gone bad but you will also be able to see it. Raw chicken will discolour and have a slightly yellowish jelly like film over it.
Throw it away!