AZL Brass is so hard to come by. When AZL releases anything brass, I would buy it up. Below are just a few pieces of AZL that have come up for bids over the years on ebay. It’s incredible what some of the items have sold for! Others have been let go way to cheap. This is a good page to watch. if you are looking for AZL z scale brass. Click on any of the images and you will be taken to current offerings on ebay. Many times, you will find nothing at times though I have seen 5 or 6 really nice pieces com up.
The AZL brass Santa Fe PA is one of my favorites. While 60 where produced, I have only seen one maybe two come across ebay in ten years. I guess everyone else loved them to. The chrome finish on these was very well done.
One of the more recent releases, the AZL Krauss-Maffei ML-4000 locomotives demonstrate the need to buy quick. I think they were sold around $900 and so sharp. I had a D&RGW I had bought to hold on to but had to let it go.