Thanks for all the advice, wow very cool of all of you.
Ok so the plan is as follows. I´m going to set up a basic quarantine-tank tomorrow morning and then I´m of to the repti-fair, hopefully I will find a garter wich "tickles my fancy"(there´s some english for you
I will keep the new garter there for a month+ and observe it carefully to see if it has any signs of sickness. Since this will be the first time i quarantine an animal, is it something particular other than that wich I should keep in mind?