What to do if someone else makes higher offer during attny review

[Chris L.]

I'm presently under attorney review and another builder came in with an offer of 13k higher on a tear down I'm selling. HX-I have had several builders make offers and then days later they would lower the offer secondary to restrictions on what can be built on the lot and a need for variance to build larger than a normal duplex. My concern is that this new guy would lower his offer in the middle of being under contract while the present guy already knows the restrictions and is set on the price. What would you do?  Go forward with the present offer or other?