Hello
I've had a hard time on selling my flasks, gems, elixirs etc.
Items used for raiding. So i thought, every time a raid ends, people rush to the auction house to refill potions or to buy gems and enchants.
And alot of raids ends about 11:00 am server time.
So what i do, is i put my stuff on AH at 11:00, undercutting everybody else. Then i log off, and log on again the next day. Almost everything is sold. Because people are desperat to enchant and get their new gear ready so they can showoff.
So putting on stuff when raids end, will minimize the chance that somebody will have time enough to undercut your auctions before your auctions have sold.
It might be common sense, but common sense ain't as common as we think it is.