Blizzard has implemented a even more awesome tool () in the vendor panel - still some items are better than others - this is not as useful as it used to be but still has some use.
This fades the items you will not be able to use (or so it thinks).
So them items lower than your desired type are faded as well.
The items are still there to be bought - just faded out. If want to buy it ... you can buy it.
/venbuy off => disable VendorBuy
/venbuy on => enable VendorBuy
/venbuy recipes => enable/disable highlighting of allready known recipes
/venbuy undesired => enable/disable highlighting of usable but undesired gear
/venbuy heirlooms => enable/disable filtering of heirlooms
/venbuy wanted => enable highlighting by desired stat [beta feature]
/venbuy stats => same as *wanted*
/venbuy looms => same as *heirlooms*
v1.0031 : somehow this is still up for Dragonflight Expansion
v1.0025 : updated toc for version 8.2.0