1936 Antietam Commemorative Half Dollar - Could It Go Au?

I'll let the pros weigh in but that is definitely one my all-time favorite designs.

I agree with the comments given above, looks like an AU slider that could grade AU55/AU58. I'd be a bit concerned about a cleaning as evidenced by what appear to be hairlines on the reverse.

It's priced at the top end for what I would consider paying.

Another element for you to consider is where do you wish to 'draw the line' on circulated status? If you acquire a high AU coin are you going to be looking for a downgrade and then be holding the prior coin that you need to resell? That can get expensive and time consuming.

Personally, my choice is XF45 or lower for inclusion into my circulated commemorative set. It allows me to avoid the buy/flip/buy scenario I just described.

Granted there are two coins in my set at AU, both of them are 'stoppers' and I may never see another.

Relative to the Antietam half, it's difficult to find a truly circulated example but they do appear on occasion. PCGD has certified 13 of these at XF45 or lower.

Of course, the goals for your set are completely up to you. The ebay coin is a lovely and likely lightly circulated example of a stunning classic silver commemorative issue.

Best of wishes with your continued searching!