Maybe not, but if you know when a set will drop, or is expected to drop, you can be ready to pounce as most vendors will have extras. Some even have planners and calendars showing expected dates for each set, and most will have a mailing list you can sign up to. This is how I knew Striker was up as an extra set at Prototypist. I'd forgotten all about it until I got an e-mail telling me. It's not a cast iron guarantee, no, but you can get most things this way if you plan it well.