How much is rolex model 15505?

The Rolex model 15505 does not exist; however, you might be referring to the Audemars Piguet Royal Oak model 15505, which typically retails for around $20,000 to $30,000, depending on condition and market demand. Prices can vary significantly based on factors like rarity, materials, and whether it includes original packaging or documentation. For the most accurate pricing, it's best to check with authorized dealers or reputable watch retailers.