Garments like underwear and bathing suits should always be purchased unworn for health reasons. If you're on a tight budget, you can usually find a great deal at discount retailers like Costco or Wal-Mart -- but these items should never be previously used. We also recommend you avoid buying car seats and bike helmets secondhand for safety reasons.
Check out the slideshow below for a full guide of items you are way better off buying brand new.
Click through to see 12 items you should always buy new:
Items you should always buy new
Budget Better: 12 things you should always buy new