for normal/realism players we see over time the prices of items going down - this is because more people are getting these items but are not losing them (too many items in game)
i suggest for a gamble method for items such as gdws item/raid/barrows/ general pvm such as zulrah
you can gamble items (duplicates) for supplies or cash (or something else) such as color kits (my favorite idea)
these colored items would be untradeable/ non reversible (unless recoloring)
it would create a way to stabilize prices dropping and increase in items in game
if people started to gamble these items for things such as color kits it would make the grind longer, more fun, and create a way to stabilize item over-stocking in game this would increase the life span of Alora aswell