What questions should be asked and what should I look for?

[Mr. Misha]

Health Gaurentee:
I would be ok with a week or two. Gives you time to examine the animal closely for signs of things like R.I and mites.

Not one breeder whether at the expo or online will give a week or two guarantee. You will get two or three days at best. The reason for that is the breeder doesn't know how capable you are as an owner.

Definitely check for mites while you hold the snake. Check for bubbles in the mouth. I also stand back and observe the snake im thinking about buying to see if he/she is opening his/her mouth a lot.

The most important thing is to quarantine the animals you just bought from your current collection.