If my main char Liela wins, then:
rank 1: coupon A thingyjig for a belt. To wear, not so much to sell.
rank 2: Velocious belt (and if I happened to win both ranks 1 and 2, I'd get the belt for only one and the gil for the other) or gil, or herald's gaiters (to sell)
rank 3: Gil, or maybe an imperial wootz ingot. I'll need 12 of those for salvage gear eventually. Or, since my limbus ls fell apart when I was next in line for homam pants, maybe I'll be a loser and get homam pants if I win rank 3.
rank 4: Khroma ore or another money item to sell, would have to check what all the prizes are selling for.
rank 5: Shadow lord statue! I so want one! It will look good with my fafnir statue.
If I win on my mule Amarantha:
rank 1: gil
rank 2: gil or herald's gaiters (to sell)
rank 3: imperial wootz ingot for salvage or just gil
rank 4: khroma ore or some other money item to sell
rank 5: Adamantoise statue to go with her behemoth statue