eBay goods usually arrive just fine. But the problem is quality. Some has been totally junk. Some look fine but junk.
I bought whole bunch of SMA connectors. It works but if I tried to torque it down or use it repeatedly, (few dozen times), it breaks.
Anything moderately critical, I buy from Digi-key. (a local supplier in US). Things that doesn't really matter comes from eBay. If it's from eBay, I test the component myself before using.