So I went ahead and gave Li Li a try. Gotta say it was went smooth. No long chit chat just straight to business. Quick summary:
Watch: 3KF Aquanaut 5167 40mm Black Dial Black Rubber Strap
Price: $432 incl. triangular shipping to Germany and insurance (5%). Transferred via PPFF.
Oct 18: First contact. Placed my order. (I checked her stock online first)
Oct 19: Sent full payment & received QC pics later on the same day. Gave my GL shortly after.
Oct 22: Tracking info received (YUU nr. & DHL nr.)
Nov 07: Package arrived. All in order. Watch is working great.
Pretty pleasant experience overall. Shipping took a little while but most importantly it made it through customs without any issues. Can highly recommend her (if it is in fact a woman, who knows lol). Cheers!