I am flying on AA in a couple of weeks on a economy/coach seat. I noticed that the flight currently has multiple open First Class seats available. I did join AA's freq flyer club but haven't earned any points yet, so that won't help. Never flown first class before so started wondering if and how it would be possible to get an upgrade if they don't fill up. Anyone know if they ever offer and what the price might be? I did fly another airline years ago where at the last minute they asked if anyone wanted to upgrade to first class it would be $50. So, what would I need to do/say/pay for a last minute upgrade at the gate? What are my chances?