Buying Off Market Without an Agent?

[Nicholas Q.]

So I found an off market deal on a duplex.  It is being marketed basically as a turn key deal...they purchased a foreclosure, did the reno, placed tenants, and would do the property management.  The numbers on it look good and the asking price is a fraction below market price.

The seller is a licensed agent and is adamant that we do not use a buyer's agent since this is an off market deal and they will not pay commissions.  However, I am getting nervous about all the details that I am not familiar with.  For example, the purchase and sale agreement template they sent me did not include a financing contingency.  I don't know even know what else to look for.

Can I hire an agent to simply draft the purchase agreement?  Can I negotiate a price with the seller and then offer to pay more to cover the agent commission?  What would you do?