Reduce the amount of duplicates that can be posted on AH

Id like the server reducing the amount of duplicates that can be posted on AH to let's say 10, it would effectively kill the scams with arrows and many other things.
As it is now you can post 40 separated stacks of 1 arrow, then 40 stacks of 2 arrows then 40 of 3 arrows and so on, puting a limit of 10 of the same item regadless of the stack size per account instead of per character would effectively kill all the trolls.
Im using arrows as example as it's the most prominent scam but it happens to many other items.

Seconded.

It's painful being forced to wait through the AH slowly churning through dozens of pages of singles when you search for something. Usually the deposit costs deter people from posting mass amounts of singles, but some items (enchanting mats) don't have a deposit cost, so you end up with something like this:
https://i.imgur.com/lJtRlPw.png

Where it takes 5+min to do a single query cause some ******* posts 40+ pages of singles.

It's something we've talked about a fair number of times. I can't comment on the likelihood of a change. As a workaround, I would recommend using an addon for the auction house.

I use the addon auctionator just for this reason and the addon itself even overloads and cancels the search if there's too many auctions of the same items, it happends 9/10 times when I need to buy iceblade arrows due to all the people trying to scam by putting 1, 10 and 100 arrows instead of 1000 for same stack price, it also have happened several times while trying to buy infinite dust and frostweave cloth.
If this change could possibly be implemented without too much hassle, it would indeed be a really good one imo.