Greust skimping on the whetstones?

So, the Wiki claims that if Greust in Act II trades whetstones for 3x armorer's scraps, and I seem to remember doing this previously. However, I just tried to trade him scrap for whetstones, but all he is offering is Wisdom scrolls (although twice as many as other vendors).

What's going on? Did I miss something? Or is he being more of an a**hole than usual?

he sells them, you have to buy them not sell things to him :)

Thanks, good lord that was nooby of me. It was the fact that he was giving me twice as many as the other vendors that was throwing me off.

Sigh.