I'm pretty sure this question has come up before. But as a customer, I'm not willing to take the chance.
In the example below, I checked hide owned resources. But several of the remaining volumes, I recognized (the popup below is one of them), so I individually checked each (by clicking 'Learn More'), and indeed it says 'you own this'.
So, of course, then you wonder if the dynamic price is accurate. Or not. And what about other collections I'm considering ... maybe I better check each volume. Maybe the price is wrong?
BTW the strange popup below is a new feature, the last few days. Latest Safari on an iPad.
