Trade in or Sell private

[hr10]

My Deepsea been w/ me for 4+ years, very satisfied, no complaint!
I just got a Panerai 005, so now I have two bigger watches in terms of size, weight and thickness. Now I am thinking to move my deepsea and getting the SD4000 or Hulk or maybe the 16610LV. If I were to get my watch, I will either get it in Hong Kong when I go back next year or through DavidSW. My question is should I just trade my watch to David or to other sellers that you can recommend? Anyone has experience can share? I know I can sell higher through private but I am not a pledge member, so it can be challenging. Also which one is your favourite out of the three watches i am looking at? I know I should try on at AD first but any suggestion is welcome