it all depends on wich e bay company. there are major turbo companys on ebay. but there are some junk ones. id stay away from any 100 dollar turbo. but the cxracing ones for 800 ea should be right on par with a masterpower or borg warner. if you can get a 76mm arround 750 to 850 it should be a great turbo. master power no longer sells after market turbos to focus on there oem market but there is a company modular turbo who is getting brazilian made turbos same as master power????? same price and so far everyone seems to like them as well.