I sold my turbo (part out) and my car (a 92) back around 05. I was broke after college and unemployed for about 1 1/2 years and needed the money. (Turbo part out plus some inkind donations from this site) got me to an awesome study abroad in Israel for 3 weeks.
In 05 when I bought my 99 sport, it came from a really good guy in DFW who had autoX it. I got serious in to C-stock and so the idea of getting at turbo was put on the back burner. I then found work, paid back all my debts, and started grad school, no time or money to play with the car for the last 2 1/2 years. I also moved into an apt with no garage.
I am getting married in June and that is taking money. I'd like to put turbo parts on my wedding registry but my wife to be gave me that "no way" look. She like me racing and doing car stuff (keeper!!!) so its cool. I'd like to get a house eventually.
The final reason, I remember the slippery slope. First one part, then the next, then the next, and before I know I will be many thousands of dollars into the car. Right now the car still has a lot of money it but with it being na H/E/suspension/wheels tires it is still a smaller money pit. Plus i've stopped caring about "classing" and am just doing what I want to it.
Although I always cruse the site looking for parts and good deals.