non EU countries you buy at the border.
Serbia will break it off in you, around 100 usd for a 30 day minimum.
I usually just try to get thru the border without it. sometimes they ask to see it, sometimes they dont. Sometimes they look at it, but dont notice SRB has a big X on it, meaning its not covered.
Ukraine, much cheaper, I've paid 3-30 usd for a month. (I think the 3.00 time was a screw up on their part, but Im always nice enough to not point out any deficiencies they may have, involving math)
(unless of course, they over charge me
I ALWAYS get it for ukraine. the cops there are legendary. they will probably stop you, and if you dont have it, they will be happy, because then they can fine you.
If you do have it, they will try to fine you for something else.
if you did nothing wrong, dont pay them. If you did do something wrong, try not to pay them. at least waste so much of their time that the 100 usd fine drops to about 5usd