Syringes bought on EBay

I have seen my question in this forum but can't find it. Are syringes bought on ebay safe to use and if so how would you clean them before using them?

Everything that I use must be packaged as Sterile when I buy it or it has to survive a scalding bath in 20% bleach/80% water. Not just wipe down - but a good long soak that reaches ALL surfaces. Followed by a lengthy wash with Anti-bacterial soap and more hot water to thoroughly rinse. My OB/GYN sub said that would render items safe.