Authentication Help - Patek Philippe Complications Annual Calendar Ref: 4947/1A-001

[Holytrinity1]

Hi everyone,

I am brand new here so please go easy on my and this would be my larger set purchase online ever

I have my sight on Patek Philippe Complications Annual Calendar Ref: 4947/1A-001 and there is one available in the classified section at TRF from watchmeout3.

Even though they are pledge member, they only have 32 posts since 2022 and can’t find much history. The price also has been reduced quite aggressively to $29,500. How do I go about checking the authenticity? What steps can I take to make sure I don’t get spammed here.

Since I am brand new I can’t post the classified link but the user doesn’t have a lot of posts so should be quite straightforward to find the listing in classified. Thank you in advance!!