I'm not sure about dealers' claims on waterproofing and servicing, having never used them but if there is a reasonably trusted seller who says that our trusted modders like Vac and The Zigmeister have serviced the watch, that may be reasonable to raise the asking price.
I found the ofrei pearl to be quite green and plastic. Is the OEM replacement from Rolex the same color and texture? Is supposed to be a lumi service replacement?