Start with the exact watch
A Submariner, Datejust, GMT-Master II or Explorer is only the beginning. Record the reference, approximate production period, dial and bezel configuration, bracelet, loose links and whether the watch has been altered or serviced. A buyer can only compare a clearly identified watch against relevant examples.
Build the evidence file
Take clear photographs of the dial, case sides, lugs, clasp, bracelet, serial-area context and all included accessories. Add service invoices, warranty documentation and purchase context where available. The goal is not to make the watch look perfect; it is to make the important facts easy to verify.
Price condition before choosing a route
Sharp case geometry, correct components, bracelet condition, service needs and complete accessories can move the credible range. Use a range rather than a single headline number, then decide whether speed, private-sale upside, trade convenience or consignment reach matters more to you.
Protect the transaction
Understand the buyer, payment method, delivery and inspection terms before surrendering the watch. A strong offer includes a process you can verify, not just a confident message or a screenshot of a transfer.
Keep the decision reversible
Do not commit because one buyer creates urgency. A documented value range and a second route give you a better negotiating position and reduce the chance that a good watch becomes a rushed exit.