I bought a Stigan at Turbo Charger Pros .com for about 600. It had a 2 YEAR warranty VS the 1 year of the Garrett. They are located in California. I will assume this turbo was manufactured in China, but with aa 2 year Warranty and no core return or charge, I figured I'd give one a try. The unit was a new, not a rebuilt one. Almost year and over 15K miles - no problems. The vane actuator was adjusted spot on and boost comes up much quicker than the old one. (AGE, I am sure) It is more than the 350 you mentioned, but still half of a Garrett. I am not saying they are the same quality as the OEM unit or knocking the original. At the time, it was what I could afford. (I got hit with 15 things at once around the house) I will say, so far it has been a good buy. I figured if it fails in 18 months, I will just claim it on the warranty. You must install a new oil feed line at the same time for the warranty. No big deal. I did not buy an EBAY turbo because I had read that they would not last. I hope this helps. Not exactly turbo you were talking about, but still half price. The link to their site is below. I did not see the 2 year warranty model listed anymore
(not good) and they seem to be more expensive. I did not look very hard though.http://www.turbochargerpros.com/ourproducts.html