I clean at the club range, and I get a five gallon bucket of range brass a month, plus whatever I scrounge when I am out & about at various ranges.
I don't turn down any brass, even the dented, tarnished, brown, nasty Berdan rifle junk that's been stomped into the mud. It's all brass. I won't pick up short .22's like LRs unless it's a big handful sitting in one pile on the bench- but I grab take 22 Mag and .17 HMR long cases for scrap. I love going to the range and seeing the rifle range glistening in the sunlight...
As far as once fired or not, typically around here people who reload take all the brass they can find. If they leave the brass it is usually WWB or Blazer Brass that was bought at Wal*Mart an hour before shooting it.
.223 is usually mil-crimped so you know it's once fired.
I get lots of military rifle cases with sealed/crimped primer. Once fired, for sure.
As far as once-fired, who cares? I have .45 acp with headstamps from the 1930's and it reloads fine.
Every now and then I split a pistol case. It goes in the scrap bin. When the case or rim gets too banged up to my eye, into the scrap bin.
As far as rifle, if I get one load out of it, it's free, isn't it? Inspect, trim, and look for thinning at the web. If any doubt- scrap bucket.
Member of the official Brass Rat Alliance (With the dumpster-stains on my shirt).
I love the types that carefully put the brass right back in the box and put it in the trash. Revolvers, rifles, etc. Makes my day.