Honour difficulty I assume?
There are several
undocumented Honour Mode exclusive changes, one of them being that several merchant items which were really good and easily obtained for a
Throw Barbarian had an increase in rarity.
Probably done so they're slightly harder to steal/buy in Honour Mode, because in Returning Pike's case the price of it jumped from 150 to 600 (x4) in Honour Mode just by increasing its rarity.