We received our upgrade bid invitation for our 1/16/23 15-night Hawaiian cruise on Royal Princess on 10/23:
$400 Deluxe Balcony
$250 Std Balcony
$150 Deluxe Obstructed Balcony
$100 Std Obstructed Balcony
When we booked, balconies were over $1000 (and still are) more than interiors so I booked an interior, hoping the balcony prices would come down closer to our sailing, when Iwould upgrade. Then Princess introduced this Upgrade Bidding program, and I was hopeful we'd get an invitation. Because I don't want an interior room, we bid $340 for the Std Balcony to try to ensure we'll get upgraded. From the posts here, that may be a little higher than necessary, but it's a lot less than the current balcony prices.
Violet