Ditto...Please do some(more) 'homework' before buying a DERV Lexus!
IS220D was/is probably the most troublesome Lexus to date, please do some searching around 'here' and don't let problems like excessive smoking, overheating, and even head gasket failures be a surprise as the 220 diesel has got inherent problems that will cost big bucks to fix, the 200D does not seem to crop up here so much with owners posting engine problems but still I would (and have) choose a IS250.
Paul m.