I would sell as-is. Definitely make sure it's not gold-filled because you don't want to misrepresent, but you should be able to get more for it as jewelry than scrap. By going as-is, you're not adding further expense to your investment. I'd open an auction at scrap + 20% to cover fees etc, and see what happens.
And before anybody says it's not gold because there's no mark, I found two 18K bangles w/no marks, which I scrapped at $900. I destroyed them because I could NOT believe they were real, I just had to see inside. Those were early days, when I was in dire straits.