If they desired to use runelite/osbuddy data they'd be OSRS gold idiot. It works and you can see when normal items are rising/falling. However, there has been a fuck ton of scammers and cost manipulators for OSbuddy and runelite suggested price trackers on lower trade volume things and even merchants efforts to control popular items. It has been a massive problem a random occasions, so sure, if you would like to go all in on a product which quite likely could only be a random scammer jumping/dropping that the osbuddy/runelite price then go ahead, because those clients track any completed supplies, it could literally be the exact same person at buy limit for a product selling them to themselves 100 times over and over and it messes up osbuddy and runelite documents but not exactly the Jagex ones.

In addition, the idea that there'd be a difficulty from a speculative market for an item buyout in the end, which I proposed in the first sentence of my opinion when I said you're assuming they purchase them as the gp comes from which does not have to be the case, does not make any sense. There is literally thousands of items. It is not like we've got a listing of 10-15 possible items to be seeing, there's easily over 100 to be watching and having a program doesn't help when when it could be a guide choice by jagex to pick something at the end of the afternoon, you do not have to have it automated, that is just asking for problems to happen. They could also have stuff in place to flag any things.

Another simple solution would be to have arbitrary buyouts rather than have one thing being bought out. Say every 100m dropped, they will buyout an item and then another 100m goes towards a different item or if 100m isn't attained, force it at a particular time interval to use whatever it's. All your assumptions are that jagex has to use the most simple method of implementing this notion or will. There is literally an infinite way to complicate it with little tiny tweaks which make it nearly impossible to predict or abuse, particularly if any step has some form of individual involvement it yells computer learning out the door nearly altogether.

Instead of buying any one thing in particular, how about buying items in g.e. with existing offers below 5 percent ge value. Makes it harder for things to crash in value. Creates a unspecified demand across the marketplace. Junk items can recover value as a proportion of 20gp will qualify easier than a item costing 20,000. Currently the only market for many items are sets, shop price and buy RS gold alch value, this would give value to ranges of low value items as it provides resistance against them crashing farther. Because their value can go up, pretty much creates a stock market it's a great investment. The market will purchase and delete and you can have the cash for selling 5 percent under out option from game. Now to create selections issue a dividend.