That's pretty cheap - I'm not in the US but that's a lot cheaper than I've seen bass strings here. Save up some more pennies and get some Rotosounds or d'Addarios.
Thing is, buying cheap strings is a false economy. You can save a couple dollars now and buy cheap strings, or you can get strings that'll last you much longer so actually cost less in the long term.
Just a fact bass strings cost more. And everything cant be super cheap. If you havent noticed price of everything is up.