Should I buy shadow of the erdtree dlc now or should I wait for any sales?

I always wanted to play sote but I was too fond of my money and always played free or 5 dollar games, elden ring was the first game that was over my budget and I loved it, now, I remembered elden ring has a dlc, so I want to play it, is there a chance that sote will have any sales or should I just buy it?