That's what 500 for $100 breaks down to. I guess buying in bulk doesn't help at all.
Not to sound too old, but back in my day, .22 ammo could be bought for a dollar for 50 rounds. I thought it was really bad when it doubled all the way to $2.
Another "deal" I saw at Scheels was a bucket of 9mm roundnose. It was 350 rounds for $150, which is just under $21.50 per 50. Should be closer to $10 for something like that, but at least they weren't charging $100 per 50. That's what they'd be charging if they raised 9mm the same as they did .22.