is this $3 per month, or for how long?
It would probably last 1 month or even lesser than that. Do note that many black forums are selling hacked spotify premium accounts using carrier partners whereby you are essentially using another person legit account which would be detected in days to months before getting cancelled.
if it is too good to be true, it is too good to be true.
More so that seller is a newbie.
Potential risk rating is @ 99.999999% that it will last less than a month