That is unlikely to happen, just because someone could wishlist all of the rare / rarity 99 items on the site, it'd take all of the "knowing" out of restocking.

We are sorting it out - it doesn't have an immediate fix yet, though.

A clarification (even though this has stopped running) - The "purchase time" will only be for items that have been sitting in the shops and not been purchased, not rare items that only pop up once every few days :)

1. It doesn't restock every four minutes, it's still random. Before, it'd load up ALL of the shops, choose randomly which ones should restock regardless if it'd restocked 30 minutes ago or 2 minutes ago. Now it'll give priority to ones that have restocked longer ago but still be random.
2. Why would this be unnecessary? Those items are selling for lower in the user shops, which means no one in their right mind is buying them from the NPC shops. In that case, they just shouldn't be there taking up space until they gain value (by being purchased from user shops) and are worth something again.
3. I can see this. I'm keeping an eye on the prices of items (GRAPHS) and the number of quests completed vs the number of sP prizes given out. It'll be interesting to see how this effects it, but I think it'll be positive. For those quests that give back items, they'll be worth more :)!

Whoops, that wasn't supposed to happen. Just cleared the shops and pushed a change for that :)

We've started seeing a few items vanish from the shops, but not many. I've still got it set at 3 days, but am probably going to change it to 1 today or tomorrow :)

We've made some alterations to the shops today that should get items restocking more often. What happened is because the algorithm favored "choosing" items that hadn't restocked in the longest amount of time, it typically chose rare items which have a harder time (obviously) going into the shop.

It's now been somewhat randomized, and the number of items chosen per restock has been increased slightly.

We'll be watching to make sure this fixed solved all of these problems!

I'm not the one working on restocking, so I can't really say how many exact changes Keith has made (though he's posted quite a bit about the issue on the Almost an Hour between restocks thread). From a programming standpoint, I can understand there being time between tweaks because you need to see how things play out through a few restocks before messing with it more.

I've linked him this thread (plus the others) just in case he has a bunch of pings to work through (I have like 20 I'm going through atm he likely has 983475 haha).