If this machine has been in use, first of all evaluate its appearance and whether you like it. Then check it for accident vin free with Epicvin or Carfax, this will give you confidence in your future purchase.
Just be sure you wana buy it. It has been juiced out for 15 years and it has out lived its healthy life. So I don't find it a great deal. Still if you sure you wana go for it then make sure to get it checked by an expert to be pretty sure on a second thought.