This was actually intended from the start. One of the factors for prices is a "Desire" variable, but I made these numbers randomized at the start for testing and then never changed them. By the end I figured I might as well keep it random to give some run variance, although if I were to work on this game more I'd want to get the variance from somewhere else, maybe through seasonal shop options or making events more dynamic. Another feature I was considering adding was some kind of indicator, whether it was icons on the map or dialogue, to indicate desired items but this got cut for time. Glad you liked it though.
Edit: Also i should say if I were to work on this more I'd like to wait till the jam voting is over, outside of major bugs I'd want my game to be judged based on what was achieved in the time limit