Almost very undergraduate I know owns at least one suit... Granted, they're not all Armani suits, but I think you'd be hard pressed to find a second-year or higher student these days who doesn't have at least one suit.
I think it would be extremely easy to find. The only reason anyone ever buys a suit in the first place is to go on an interview for a ('real') job or attend a wedding.
Or a funeral, which is why I bought my first suit in college. College is prime-time for grandparents passing away.