45 ACP brass and 9mm brass are basically free.
Go to the nearest indoor range, pay range fee, scoop up brass. The only thing that sometimes make me think of abandoning my 10mm is the lure of all that free 45ACP, 45 Colt, 40 S&W, 357 Mag, 9mm and 38 Special brass I skate on while I shoot.
Otherwise, see above. Those prices seem pretty normal for right now.