Cull Obsidian

I don't see why you would need to drive to the States for nothing, all you need to do is purchase a copy online if you have an account and either have it delivered to the store of your choice, or if you check online it will show you stock anyway.
If your store location has a copy, simply purchase it and select pickup at store.

BB US is different than Canada, they don't reserve, you purchase the item and it's held for you, if after so many days you don't pick it up, it's put back in stock and you get a refund.

I've done this many times when availability is "Store Pickup Only"