sales contract

If I am buying a house and the appraisal comes in $50,000 low, does the seller have to sell it to me at that price?

Typically, the seller would have the option of selling at the appraised value, allowing the transaction to proceed as otherwise planned. However, the obligations and rights of both buyer and seller are dictated by the terms of the sales agreement. Review your specific contract language as pertains to appraisal contingencies with your Realtor or attorney to determine what options are available.