I'm pretty cheap, and there's not a pony on my want list (yet!) that I want so badly I'm likely to lose my head over in an auction. But then again, I'm new to this game, and I didn't understand why someone would need to challenge themself to not buy ponies for a month. Now I TOTALLY get it.
I do also have a tendency to need to have the last word, so if I got started, there's no real telling where I might end up.