V-Flyer

Managed to get a premium saver reward seat for a good price, but miles for Upper Class are mad, over 1 million for two passengers, who even has those numbers!!
I don't mind doing the outbound in PE it's a reasonably short flight and departs at 11pm. I am going to bid on the return flight to Upper. Does anyone know what would be a reasonable bid for the 8hr daytime flight back to LHR?

Thanks in anticipation,

Steve