FHA Buyer and credit/concession for closing

[Sai T.]

Hello Everyone 

I have $200K full listing price offer from FHA buyer but condition is to credit/concession $8,000 for closing cost.

Issue is that buyers agent adding a condition in the contract if the appraisal is less than listing price $200K then buyer will renegotiate the credit/concession amount.

Sellers net will be $192K if there’s no issue with appraisal value but if appraisal comes $195K buyers still wants $8,000 but I want offer $3,000. Who’s right? And what I can do 

Thank you for your feedback