Help! Old Gold Coin

Sorry, vr6ron, but your pics are too blurry to say anything definite other than, "It looks Roman".

It's not likely to be gold, either. The Romans did make brass coins, which is what you're likely to have.

From what you've said, and from what I can make out on the pictures, my best guess is a brass sestertius of Severus Alexander, reverse type Annona - something like this one on Wildwinds.

Prices realised for ancient bronzes are generally higher for fully identified and attributed coins than for something described as "? ancient Roman thingy ?" or some such. Price also varies a lot depending on condition. If it's "shiny", then it's likely to have been overcleaned, and not worth as much to collectors.

The particular coin I mentioned above is listed in the latest edition of the Sear catalogue as number 7963. Catalogue value there is $30 in Fine, $125 in Very Fine. That specimen shown on Wildwinds sold on ebay for $75.

Who knows - if it's a scarce or interesting variety, someone specialising in the field might be prepared to pay even more.

It should also be mentioned that it could also be fake; the FORVM database of fake Severus Alexander sestertii doesn't list this type, but others types are listed.

Clearer pics would help confirm the identity and authenticity of your coin, if you can get them. You'll certainly need clearer pics if you plan to sell it on ebay.