Don't lie to me. I know you still have that poppin' Abercrombie polo in the back of your closet from 7th grade. Rock that or head to Goodwill and purchase someone else's fashion mistake.
Acid wash jeans are the preference, so find someone who was cool in the 90's. Worst case, wear regular jeans.
Heinous chunky jewelry.
A lot of these things can be made from your current closet, a friend's closet, the dollar store, and/or a consignment shop. This costume can be created for free if you try hard enough. Plus it is a fun throwback to a classic movie.