If you are going on the job search, only buy a suit as you have an on-site interview scheduled. Or, if you are having to come from out of town, buy only one per day at the interview.
I got carried away with my job search this last year and bought three suits. Two of them I wore to two interviews at the same school. The third one I bought because it was pretty.
It’s been only three months since the interview and I got out the third suit to try on. (I have a meeting as an adjunct at the college.) It is so loose it almost falls off.
So don’t buy suits in a euphoria thinking “I’m going to get this job!” And don’t buy more than you need.