Very nice bike! I have one, and I think it is great! I don't believe the saddle is original. I believe they came with a Fujita Seamless Saddle. Regardless, you have a very special bike.
I've seen the original documentation for my bike. I believe the MSRP was $250. The original owner paid $220. Depending on your market and demand, I would estimate between $400-600. Another Bike Forum member attempted to sell his restored World Voyageur in the Detroit area for many months without luck. If I recall right, he eventually sold it for in the low to mid $400. Location, condition, season, size, marketing, and luck determine the eventually value of the bike. It is only worth what someone is willing to pay.