I’d like to be able to adjust the price of my listed items. Typically I’d want to lower it when an item doesn’t sell.
I suggest it can be done via My Stall at the Bazaar.
Technically you can, though it’s cumbersome and annoying to use.
Just remove your item from the listings and list it again.
This means you’ll spend favour again to re-list it, though favour is rarely an issue unless you’re selling 100 items per day.
But yes, a proper re-listing mechanic would be a good addition.