For comparison I bought this F serial with box and papers (out of warranty but nice to have) for $3450.00 about 6 months ago. Deals are out there on the Forum and/or Timezone.
Also one other difference is the SWISS or SWISS MADE on the dial. SWISS was used for a couple years. I won't buy one withe SWISS (just don't like how it looks) but others SWEAR by them thinking maybe they could be sought after one day. I donno...