Using a realtors contract

[DeAndre Mason]

BP,

I have an off market deal in the pipeline but the seller has had an agent contact me saying she will submit an offer with a purchase and sale agreement. Giving this contract is assignable, What else should I deem necessary to be put into the contract besides an inspection contingency and marketing clause. I plan on wholesaling this deal. I will be opening escrow with this purchase agreement with a title Attorney and the realtor will not be getting a commission. 

Should I use the realtor’a contract? If so, what else should I negotiate in the contract.