I could be totally wrong and I'm just getting the worst draws possible, but I'm of the understanding that Sea Posts have not had their shop stock updated in years. Because of this, most players in possession of the entire Year 1 inventory stock have no reason to return there, short of bonus fish rewards.
I would absolutely love it if these stores could be updated with most of the current item stock in rotation, so myself and many others could happily cannon off towards these cute lil enclaves once again in search of a virtual bargain!
