Theres a lot of threads on NASIOC about people who have bought cheap Chinese replica TD05 turbos off eBay. Some people have gotten a reasonable lifespan out of them. However, the majority experience has been premature failure, and observation of poor quality castings. The overwhelming concensus is to avoid them like the plague, and to save up for one from a reputable builder (Blouch, Forced Performance, Deadbolt, prominent JDM tuners, etc) rather than risk the bargain.
Not saying that Driven Performance are trying to hock off substandard Chinese turbos, but if there's any question that they come from the same supply chain as the ones on eBay, there's plenty of experience in the US which says to steer well clear.