I got 1k fm them a couple months ago. It contained a mix of PS, TZZ, IMG and a few LC headstamps. They ship about 1100 rds in the can, and after I sorted it out, I ended up with about 1050 rds. A number of rounds were severly dented, the smaller dents aren't a problem.
Watch out for rounds that have severe corrosion and cull them out. I found a couple rounds that were so corroded, the powder had drained out of the round. I also found a couple were the bullet was pushed deep into the brass.
Once you pull out all the crap, it worked fine. If you are concerned about the dirt/dust, hit them with some steel wool, or throw them in small lots of about 75-100 into a tumbler for 30 minutes. If you tumble it gently, and for a brief time period, it won't cause any problems.
The 30 minutes won't make the brass bright/shiney, but it will clear off the heavy dirt.