I’m in the UK and for international shipping I use DHL express. However above say £8-10k I’d be looking at alternate options. If you’re moving a £35k watch from the UK to Germany, 1) I’d be doing bank transfer only. No escrow, whatever the hell that is. 2) Between those countries I’d be flying and either asking the buyer to collect from you or flying out to drop it off and make a weekend out of it.