What happens when you sign a lease with the option to buy and the house because of the economy will no longer appraise for the agreed upon amount? The tenant is now in default of the terms of the lease which now gives him the option to buy or vacate in 30 days. The tenant is only 6 months into the lease and the lease was originally for up to 3 years allowing tenant to buy at anytime before the 3 years with no penalty. At the time the lease was signed tenant was getting the house for roughly 10,000 under market value, as it did need some work. The agreed upon price was reached 3 months before tenant moved in. Will tenant have to come up with the difference to make the appraisal, will the landlord have to drop the price or will the whole lease just become void?