buying fourplex from realtor w/out one myself

I direct mailed a bunch of multi-family owners in my area, and got a response from a realtor who owns a quadplex.   In my letter, I said I'd like to avoid using realtors (and use an attorney instead) to save some cash.  Have I lost any financial incentive for me to not use a realtor myself?  Or am I thinking about this wrong? Now that he's a realtor, whats the best way to proceed? If i move forward, is he going to claim buyers agent?