300 is nothing to sneeze at, congrats on getting that.
Congrats also on others who recently reached the 500+ mark.
I think the last 15 or so was the toughest, though oddly a few of them should have been easy to get.
Example is the Mechanical Pandaren Dragon
, though I could have bought it, on my server usually around 1200 to 1500 gold. For me it was the principal of the thing, my engineer was 4 levels away from having the ability to make them and I just never found the time to level him.
2nd example is Tranquil Mechanical Yeti
, I never got the quest done to get the recipe (you can't get it anymore
) so I gathered the materials and had someone who had the recipe combine it for me. I paid 50 gold as a tip, but way better than having to buy them for 1000+ gold.
The new fishing pets are also still in the works, have only camped 2 of them so far.