lol @ this "buy legit or it's going to break" idea....
I know multiple people that have been running ebay turbo kits for PLENTY of time... friend of mine is almost to 2 years on his kit.
If you're really that worried about it, IMO get everything, then go buy a rebuild kit from a reputable brand and just throw the hardware into the turbo. any "good" tuner should know what to get for you. A local guy rebuilds ebay shit with garret parts all the time. hella cheap, and I havent seen a single one come back to him, or heard of anyone upset about it.
Cheap builds are the way to go! I got a buddy who just boosted a teg with 700 bucks with a good tune and 3" exhaust. Hell, I bought and boosted a civic for 500 total. IMO if you're not trying to run 200+ hp, and you're not an idiot when it comes to putting your foot on the gas, there's absolutely nothing wrong with ebay kits.