Whether to walk comes down to your own line in the sand, and to being honest about what a buydown is actually worth to you. The builder's reversal could be hardball, or it could be a genuine repricing. Some large national builders forward-commit to blocks of low rates, and when those run out they lose the ability to offer the buydown at the old terms, which forces the price and rate conversation to reset. Step back from the specific move and look at what you are getting. A builder-paid rate buydown is a benefit you only capture if you keep the loan. If rates later come down and you refinance, the buydown's value is gone, and nobody can promise which way rates go. A lower purchase price, covered closing costs, or included upgrades stay with you no matter what happens to rates afterward. On many deals we would rather fight for those than for a rate subsidy that dies the moment you refinance. Use the reversal as information. If the deal still works at the new price and you value the home, that is one answer. If the reversal pushes you past the number you promised yourself, that is the other. If you want to pressure-test whether the buydown or the price cut is the better deal for your situation, that is exactly the math we run on the free Roadmap conversation.