Welcome to the group.
The S3X list price is high but there are internet bargains available. AEBike lists it for about $112 currently with shifter and installation kit. Amazon prices vary from 4120 to $225! A higher price than most other 3 speed hubs but I believe that it is a limited production specialty item compared to standard 3 speed hubs. In fact the internals are basically SA 5 speed. The disk brake Shimano 3 speed, the SG-3D55, actually retails for more on the AEBike web site.
At least one dealer on here has commented that some internet retailers are selling it for less than his dealer cost!
--- In Geared_hub_bikes@yahoogroups.com, "capt_bicycle" <cycle789@...> wrote:
> Hi Internal Gearheads; I'm new to the group and building up a cheapo 700c cross frame with a Nexus-8 SG-8R36 as the centerpiece. Seriously considered SA X-RF5(W) as well as the quasi-fixie SA S3X (what's up with the price of that thing?). I've rebuilt a couple of SA 3-speed hubs using Glenn's Complete Bicycle Manual from the 1970's.