Hi: I booked 2 nights at the Hilton in the Financial District of SF. At the conclusion of the booking, I was asked if I was interested in purchasing upgrades if they were available at the time of check in. I received gold status recently and I really am interested in an upgrade. Nevertheless, I would obviously rather receive a free upgrade over a paid upgrade. That being said, should I accept the option to be offered paid upgrades or should I decline the option and try and request an upgrade for free or for money upon checking in? Thank you in advance for your time.