About this suggestion, I feel like it would take some aspect of exploration off when prices would be listed like on start post screenshot.
As long as placing items to plinths is free and items are not time locked location listing would just have own problems with possible exploiting by locking actual shop areas and plinths from being available. Also average prices and buy action history could be manipulated by groups to make everything look lower value than it would actually be.
Because I wrote just negative things list would have uses but I think it shouldn’t tell too much data. For example prices shouldn’t been shown just use scale to compare other prices and show text value like low, average, high price; same way like some knowledge items are listed.