Game Pass Ultimate

So three months ago, I got Game Pass Ultimate for $1 (it converted my Xbox Live Gold months for 2 extra months). I just now canceled it cause it was about to expire and I didn't want to pay $15 bucks. But when I look at Game Pass Ultimate in the store,
it still shows the $1 deal. I was curious and pressed purchase and when the list of credit cards showed up, it still said $1 for first month. If I were to buy it, would it cost $1 or $15?

:)