VW Related -- Turbo Charger Question

["mikesoft" <mikesoft@europa1.conwaycorp.net>]

I came across a '90 Corrado in the paper today going
for $1800. I tried calling the owner but the phone must
have been engaged or off the hook. The ad says that 
the car requires a new turbo charger. What are the 
implications of this cost wise and car wise ? Is the
car immobilised without it ? Thanks to anyone who can 
give me an insight on this....might save me a long distance
phone call. 

Mike Theuri
88 80Q