Corrupted items not showing up in Auction search.

I got a Corrupted Staff and wanted to check for the lowest price...but it seems not a single Corrupted item besides "Essence" shows up.

I had to put Staff for word and at "Min. Lv" -30- and looked page by page for first one. Dont know why doesnt show up but people might not buy items if they dont see them pop at the search word