Sigma lense for nikon d3000?

Could some one please link me to a good cheap sigma lense for my new nikon d3000

Added (1). I want to shoot everything both night and day. I just need a cheap sigma lens for my specific camera

What kind of stuff do you want to shoot?

here's all their lenses
http://www.sigmaphoto.com/...hop/lenses

Http://www.bhphotovideo.com