Am I allowed to sell items on this subreddit or is there a different wow subreddit I should go to?

Ive been trying to sell my last two haunted mementos for about a week now, I've tried listing it on the AH in Area 52(horde), Stormrage(Ali), proudmoore(Ali) and so far no luck, any suggestions of which server I might have better luck selling them? Or any subreddit where I can list them for sale? My objective is to sell them for at least 600k each so I can get myself 5 wow tokens, 4 to buy the midnight expansion and 1 to get a month of wow and play the expansion. I'd appreciate any suggestions, thanks.