Infiniti j30 1994 w/ 161k miles vs Chrysler Sebring Convertible 1999 w/ 112k miles.?

This would not be a good idea. The early model Infiniti's suffer many electircal problems, and a majority of the parts are now discontinued. This would leave you with getting junk yard parts, which while isn't entirely bad in and of itself, you would be hard pressed to find many Infiniti parts in junk yards. Stay away from foreign cars below 1995 unless they are the usual Honda's or Toyotas. Mercedes, Jaguar, Audi, most of these manufacturers have discontinued parts because so many of them were year and model specific. This also presents a problem with used parts because one faulty part may only fit 1994 models with a particular engine, which would extremely limit the chance of you finding one in your area.