In process of buying, please advise

[Pyclah]

Hello my fellow rolex fanatics and experts. I am currently in the process of buying a Tudor Snowflake sub and I have some questions about the watch I have chosen. Thankfully this site exists and you are all kind enough to share your expertise and advise in cases like this. I am about to spend $2000 on this watch and want to make sure i am not wasting my hard earned cash on a piece of junk. I have included a few pictures so anyone with knowledge about this watch can give me an idea if it looks original, is it worth the money that I'm about to pay, possible the year of production and just general information about the watch. Serial number 548677. Tudor sub 9511/0. Thank you all so much