First thing i need to say: DO NOT BUY FROM EBAY
Secondly, having turboed many cars and mine 3 times, i'll tell you right now that its going to cost AT LEAST $3k. I dont pay full price on anything anymore, but my setup still cost me $5k approx....you CAN do it for less, but you have three options really...pick 2 of them
1. Reliable
2. Cheap
3. Fast