Aydin, my two cents...I wouldn't recommend buying your helmet used, but everything else (suit, underwear, gloves, shoes, etc) can be found just fine used. You probably would want to buy that stuff in-person to ensure you could try it on for fit before handing over your cash. And get your helmet from a vendor that allows free exchanges, as helmet manufacturers use different sizing guidelines when constructing their helmets. You'll see vendors at most track events with new, "defect", and used gear. Even those huge swap meets you have in Cali are probably a good bet to check out for used gear.