-1 on time set.
Personally, I don't want to reset my shop every other day, even if I was active. I do it once a week, or whenever I feel like it.
-1 on the idea of forcing people to lower price for faster sell. You wish!
Econ doesn't work that way.
Say merchant A wants to sell a hatter card at 500k.
Merchant B will have to vend it at 499k or so to win buyer.
Then Merchant A will lower to 498k.
As a buyer knowing how this works, I'll wait until that hatter drop to 1z to buy. Everyone will do the same since they know the price will go lower by days.
-1 on vending crap.
Your crap is someone else's treasure. And your treasure is their crap.