So you just found the best deal ever on a watch forum. It scored big on all the important criteria you wanted. The kind seller had 500 plus posts! You wear that fine watch for a year or so and decide to trade it in…
You sell it in the same fashion via forum sales section, but this time your buyer has an A.D. open it up to check the guts. Scratch! Serial on the movement gone? Yup, stolen, gray market, worthless. It happens. Check your sellers, check credentials, get info on the watch. If it has a history, find it! You did your tire kicking, now look under the hood before purchase.