Wholesale Deal - Fixed Fee for Wholesaler - Contract Contingency

[Paul Lowder]

Hello BP!  I'm curious if something like the following exists:  a contract contingency that would essentially make the wholesale fee fixed.  For example, say the seller and I signed for a purchase price of $50k to go to the seller, but if the assignor can assign the contract for anything over $60k, the excess would go to the seller on close.  I know this sounds silly from an investor standpoint since as investors we are actively looking to make as much as possible.  However, I'm dealing with a seller who I think would appreciate some goodwill in this fashion.  If anyone has heard of or done anything like this before, I would appreciate any info!