First time buyer - any help advice

[vicv]

Hi guys, hope you don't mind me posting this question, it's probably been asked 100's of times before.

I am about to buy my first rolex but I am really unsure what to watch out for and what one I want.

I have seen a white ROLEX MILGAUSS which I really liked. It's an approved dealer so I guess it's a safe bet. He was hitting me with the big sell - telling how rare it is and how I will need to buy it now etc....

He had a Green Crystal but wasn't selling - he is waiting on approval from Rolex to sell it - no idea what this means.

I'm on holiday in the caribbean in a couple of months so was thinking of holding off until then to see whats available but I have heard some horrow stories about this.

Anyone got any advice for me please?