I just wanted to give everyone a heads up. I just purchased an S500 off eBay...I know, taking my chances and it didn't work out. It was an unusual dlc S500 so I rolled the dice. Anyway, It was purchased from a guy in Canada, but sent from Hong Kong. I several S500's listed from Hong Kong from different sellers on eBay right now. After I got it the watch looks like the packaging and watch itself are real, but it was gaining somewhere like 30 seconds a day and the day disc was jumping two days for every one, so my flag started to go up. Well, fortunately I have the tools and I took off the back and the faraday cage lid...someone had taken out the COSC 2836 movement and replaced it with a Seagull junk movement, as in the total lowest clone that would fit in there (raw brass garbage). I know that this seller has several of these listed. It is possible that this is a one off deal, but I kind of doubt it. It looks like I am going to get my money back because I don't believe that the seller was in on this, but BEWARE. Who knows how many of these might be floating out there if this is something that is going on right now as a scam, which I suspect it is. If it has a closed case back and you do not know the seller be careful folks.