How much is 500 doubloons?

Could you please clarify the value of 500 doubloons in today's market? Doubloons, as a historical currency, were used primarily in the 17th and 18th centuries. They vary significantly in rarity, composition, and condition, which directly impact their value. For instance, a well-preserved gold doubloon from the Spanish Empire could fetch a high price at auction, while a worn-out silver doubloon from a less renowned issuer may be worth significantly less. Therefore, without further context or specifics, estimating the exact worth of 500 doubloons is quite challenging. Would you perhaps be able to provide additional information on the doubloons you're inquiring about, such as their era, mintmark, condition, or material?