I haven't tried the bidding system yet. I wonder what effect it would have on the traditionally almost empty mid-January/February sleeping cars. Are there enough savvy coach customers to fill the cars?
Would also be interested to hear about successful low bids. I bet there is a sekrit minimum.
You would assume there is a secret minimum to at least cover laundry/ food costs associated with the room....
There is no secret minimum. When I booked an Acela, there was a minimum amount that the system would even let me bid to upgrade to first (i.e. I couldn’t bid $5, it was maybe $40-something, but I forgot). I forget if I actually took the bid or just let it go.