Commercial loan seller credit cap?

[Kujtim Beganaj]

About to purchase a 5-unit off market. I believe it will appraise for higher than the purchase price we are agreeing to. If value comes in higher, I’d like to increase the sale price to the appraised value and increase the seller credit. Which in turn will lower my closing costs. The seller just wants a certain net and get out of it bc they are moving across the country. They would be fine with it (cousin in laws).

My question is, is there a cap on seller credit. I am seeing various things online?

Thanks in advance!