At my local HD, no yellow clearance stickers, but noticed that one of the boxes in the Cast Iron Grate pile was different. Of course it was the bottom one, but pulled it out and took it to the register. It was the 7586 SS grate mentioned in the earlier posts, but this time rang up as $.01. That caused a flurry of activity from three "managers". One argued with me that after spending 10 minutes looking at part history, it should have been the $23 and change, I countered with "the part has been on clearance for a month, and obviously not selling, now the price is $.01 when I scan the UPC". He countered with "that's our code for something that's going back to the vendor". I told him he was BSing me, he was not going to send one grate back to the vendor (which did not even show up on their inventory when I searched for it, so the store didn't even know they had it).
Wound up getting it for $10. Lesson learned. Next one I find I go to the self-checkout.