Rolex Presidential Oyster Perpetual Lady Datejust

Watch oyster perpetual lady-datejust, 26 mm, 18kt yellow gold case, 18kt yellow gold fluted bezel, 31 Jewel chronometer movement, synthetic sapphire crystal, white diamond dial, 18kt yellow gold president bracelet. Serial number f 92896, model number are 17917 85 UB 83138. New it would be $23,000. Other sites list this same exact watch for $13,000. I am asking $11,600.