I just don't value the older pre 1980s Wilton's when they weren't cut on CNC machines (with the exception of their older wood vises from the 50s and 60s that are USA and seriously beefy).
Wilton's are all over the place on used prices. I've seen 5-10 year old 400s/450s for less than $200 with a base.
Not sure why anyone would value that at $400. Personal preference I suppose.