If you dont want BfA-Retail.
How much cost the subscription to only Classic?
Standard sub fee.
it cost the subscription 15$ a month that is all. you dont have to buy anything else.
subscription cost doesn’t change based on which expansions you own or don’t own.
How much will classic COST ?
… everything!
A subscription costs $15 per month, and lets you log into the Classic servers in just over a week(and make up to 3 characters right now) or the retail servers at any time.
If you don’t want to use all of it, you still pay $15.
You don’t have to own BfA to play Classic, though.
$15 per month xub gets you access to both Classic and retail.
If you hate retail just never log in to it and you’re gold.