Any guidelines on eBay purchases?

[Boub65]

I would add :
* no answers to your questions

You have two types of sellers (regarding questions) :
- one type that does not really know what info is important for buyer (screen on, battery compartment picture, etc...) and they will reply to your questions often with complementary pictures or infos
- one type that knows well the (bad) state of the calculator, hides informations and won't answer your questions