Well, for starters, all Pacers are 2-doors. There was a coupe and a wagon.

The X-package changed from year-to-year. What year is the car? That would narrow it down and I could tell you exactly what it could have come with. But also, keep in mind that you could order any of the X-package options separately and you could also add optional equipment to the X-package as long as it didn't interfere with X-package equipment (which anything rarely did). The X-package on a Pacer is similar to what you'd find on a Gremlin or Hornet. Bucket seats, Sport steering wheel, carpet, stripes, Rallye Wheels. It's simply a trim level.

As for Pacers themselves, unless the car is in near mint condition or at least very good condition; walk away. While mechanical parts are easy to find for an AMC, model specific parts are becoming increasingly rare and expensive. To restore a Pacer could cost thousands of dollars if it requires sheetmetal or paint, or even glass. At the end of they day, the car could bring $5,000 to $7,000. I've yet to see a Pacer cross the 10k mark yet.

They drive nice. They ride nice and they're very comfortable cars. But they are slow and get poorer fuel mileage than any of their contemporary competition. Essentially, you buy them because you like them and they become a family member. A Pacer is the least-likely car to ever become an investment.