Recently I have noticed an abundance of "95% new" S500s for sale both on the bay and on chrono24 - all at the $1799 price point.
All the listings are coming out of Japan or Hong Kong, come with nothing other than the watch and the leather roll.
I did a little research and I managed to find one link from a dubious source with a rep for ~$200.
Looks like the front/dial of the watch are pretty spot on, the finishing on the casing doesn't look as good with the mix of brushed/polished, and there are some inconsistencies in the font on the caseback markings *i think*
Maybe I am being SUPER paranoid, but I would hate for someone to get burned.
Don't want to over step the mark in what I can/can't post, so let me know if anyone want's me to elaborate.