Yep, I just replaced my brakes and there were complete assemblies available for about the same price as just the shoes.  
Something to think about though.  Are the assemblies from eBay self adjusting or manual adjusting?  In fact, are your current brakes self adjusting?  If they are manual adjusting, you need to adjust them every 3000 miles in order to maintain adequate braking.  I upgraded when I did mine and put in "forward" adjusting brakes manufactured by Lippert.  It was a little bit more money, but at least I won't have to adjust the brakes every 3K miles.