Thanks for playing and giving feedback!
That's totally valid criticism. Customers have a chance to accept, counter-offer, or walk away based on how fair your offer is, and part of the design is that the player doesn't have access to perfect information about those odds.
But I don't want players to be totally in the dark, either. I have some ideas on how to introduce the baseline odds and then adding certain hint indicators (facial expressions, more dialogue, etc). Thank you!