Does anyone have a real world transactional financing example?

[Khadijah Celestine]

I understand how transactional financing works with the whole AB closing and the BC closing with the wholesaler/investor being the "B". But, when your C buyer is financing via a mortgage, how is it that you can have them lined up already? When would they be able to agree upon a price with their lender? Do these kind of deals only work when the property is not on the MLS?