Hello — It's from Roman Egypt, Alexandria Mint. It would help if you provided diameter and weight, which should be approximately similar to this tetradrachm of Nero.
If on closer inspection it turns out not to be your coin, here is the rest of Nero's coins from Alexandria, but our catalogue is probably not complete for this series.
Are you sure of the weght of yours? Both the one I linked from the catalogue and the eBay one you linked are about the same weight, and the diameter is about 25mm for the three of them.
And can you read LIA at the left of the eagle? I think I see traces of it.
For those who read this and would like to know, the eBay link can be shortened by removing tracking info, i.e. everything from the “?” to the end: https://www.ebay.com/itm/286609648064
