It's great that you included many good photos, but it is much easier to respond to posts like this if, instead of saying "How much is this worth?" you give some details, like "The seller said this watch just had a full service, and he's asking for $2,000. Is that reasonable?"
The seller is asking 550€ and says the movement has just been serviced. So what do you think? I'm asking cos I don't know how much do this model usually sell for in this condition 😀