If you want to read a few older threads on Newegg refurbs, try Advanced Search of both GH and Off-Topic.
Unless a part is a manufacturer refurb you can't count on any testing by the vendor -- a customer returns a part, the vendor says "OK, I don't see any scorch marks" and puts it in the refurb bin.
You're rolling the dice. With Newegg you'll at least be able to return a bad refurb, but you'll pay the shipping not them.