IMO, items still moving, just the price issue, give and take only.
Example my old good DML bought at 60 mil 6 months ago, and sold recently at 5 mil only.
Why I take the lost? All used to good items are flooded in AH, all price at 1-5 mil.
If u think taking lost is pain, you have to decide to keep until drop to vendor price, or just sell it cheap to benefit other character who are new or really need it as their upgrade.
At the plus side, I sold a lot of rare weapons (axe, mace, mighty sword, sword) at 50-150 mil, from lucky picks, or either buy and test 1 hr of play and resell it back.
I did buy weapon at 20 mil and feel not suit the character and resell it back at 150 mil, and it sold in 2 hrs. I think the previous seller is either price wrongly or just need fast gold like what I do always.
I will always gain back even more, after lost a few 100 mil of golds.
Anyway it's just game, enjoy it by testing different builds/weapons, buy and sell, you will get surprise always, :)