Things NOT to do when buying a luxury watch

Improve your buying etiquette:
1) Don’t use the grey market as a supposed bargaining chip
2) Stop leading off with ‘what’s your best price?’
3) Never finance a watch
4) Stop pretending. Wait until you are actually ready
5) Be realistic. The ability to pay is not the deciding factor with some models
6) Read the full listing. Do your homework. Become the expert.

Do you have any buying/selling pet peeves? What about suggestions to the newer watch enthusiast?