Need help structuring 1st preforeclosure deal

I have a client that has a property scheduled for auction the first of the year. We would like to sell the property, and I would like to structure the deal so that she and I walk away from closing with something. Current balance is 82k tax assessed value is 116k (which is usually lower that FMV). Any help will be appreciated.
Thinking of selling to buyer, whomever he/she may be, for around 105k, agreeing to pay 3% closing costs leaving around 11-20k in equity, all depends on the fair market value, and my client and I split the profit. How can I legally have a check divided and dispursed? I have an LLC, but am still learning how to use it for real estate.

Jaz