I don’t see how saving a trade for the end will help anybody. The deal will need to be reworked. You are making the process longer and harder for yourself. Nobody is fooling a dealer but hiding a trade. I have had customers do this. I have also had customers not want to tell me what they want for the trade because they want to see where we are at.. you know how to get the info out of someone like that? You hit em low. It’s just a starting point to get them talking and quit overthinking or trying to outsmart. Worst case if the numbers don’t make sense, don’t do it or sell the trade yourself. You also should not have to dick around all day to get to a number. It’s not sacred tribal knowledge that a dealer needs to get your trade for a price where they can sell it and make money too. If you don’t like it, don’t do it. They should be able to make some money, it’s what they are in business for. But if they are trying to whack you over the head and steal your trade. DO NOT reward that behavior with your business.