This happens all the time. So, just live with it if you decide to sell. There are people like that in the real world.
You may sell it as "First come, first serve." Don't hold the watch for anyone until you receive payment.
I ve sold a few watches on RWI and whoever paid me first got the watch. It worked great for me.
Btw, that 's a nice fiddy with all the upgrades that I wanted to do on mine.
Did you hear your otherside telling you to keep it? Keep it.