My furry friend is now 33. I see warden staff generally go for 300g in AH.

Which is doable I guess.

i make wow gold by kill mobs

With my feral druid I do most of my farming in Maraudon, soloing princess. I just vendor the blues and gather herbs. The herbs are actually quite valuable. I think that I net something like 60g an hour.

An advantage to this farm is that it's not that dull. I do it specced pure feral in random tier pieces that I've gotten. Apparently spell damage blues work too, but the 3 piece set bonus from T2 is nice for mana regen.

I'll also echo Psojed from above: don't buy Warden Staff. This is not merely because it's expensive, but because it's actually not even bis either. Unyielding Maul is a better all purpose tanking weapon. While the stats on WS are slightly better, the main difference is that UM is a mace. This means that you can use an Iron Counterweight on it. Since 3% haste is much better than 15 agi UM comes out ahead.

I bought warden staff early in my druid career, but I've recently mostly stopped using it .