For a couple weeks now, I've been only 3 'vanity' pets away from completing the Lil' Game Hunter achievement. Checking the auction house, they were all selling for well over 300g each. :-\ Not really on the top of my priority list for use of my gold resources.
Looking at my 'currency' tab, I noticed that I had well over 90 of the Champion Seals from doing the Tournament dailies. So each of the Champion pets are only 40 seals, but I was really saving for my hippogryph mount.
Last night, I broke down and bought the Tirisfal Bat and the Mulgore Hatchling, then plopped down the 300g to get the Senjin Fetish. This put me at 75 pets, earning me the little fawn!