Bid the minimum of $90 for UIO-PTY (1.5 hrs), was labled "pobre". I saw on expertflyer.com J9. Received upgrade <24 hours later.
I booked the flight late, only got 1 invite email, responded, or "won". Is $90 (+PA taxes = 100.70) 'worth it' for a short flight? Depends. I know I won't have to worry about overhead storage, or the agent hassling me about the size or weight of my carry-on, boarding in group 1, using the "gold line" or whatever, etc.. A good value for this traveler.