Here is my 2 cents.

I have had the stainless only Rolex for 17 years, the gold and stainless Rolex is about as old as the stainless one but I have only had it about a year. They were both used and both manufactured in the early 80's. I just had the stainless one serviced by Rolex and it cost almost a grand. It had never been in to be done and even when I sent it in it was working perfectly. I just did not want to wait for it to stop working before sending it in.