The Ebay turbo kits tend to be shite. They are made from cheap materials and the manafolds tend to crack. However if you are only running low boost then they might hold for a while. However you get what you pay for, buy cheap buy twice and all that
have you ever used one? im not to bothered about the manifold as i can get one made cheap anought. i was more thinking of the turbo, wastegate and intercooler as all the pipework is cheap and easy to get hold of.