Would it be possible to have the current highest bid visible on the Main Deck page https://www.nationstates.net/page=deck in the top right corner of the flag like on the Open Pack page?
I've junked a number of cards that had an active bid on it that I would have sold or held off from junking if I'd known their was a bid out there. Before junking you currently have to individually check each Card to see their is a bid on the card.