I think I was spoilt regarding equipment in the 15-30 horde ranks:- Wailing Cavern (great agil drops), Blackfathom deeps (also some nice +agi drops), Shadowfang keep for that nice cloak, Razorfen Krawl/Gnomeregan for the odd piece or two.
But when I hit the 30's, I got nothing from the instances! Nothing! The scarlet Monastery is full of cloth and tank mail, Razorfen Downs has two pieces of nice +agil but the drop rates are like 0.02%.
So am I missing something? I think I was well geared until the 30's after which I fell slightly behind to curve again and had to spend 40g of my mount money buying some green items from the auction house. Where do other hunters go for equipment in the 30-40 ranks?