New Agent, seller financing investment opportunity

[Kristal Amber Matthews]

There is a seller financing opportunity on a huge fixer upper in my neighborhood. I've been told by an architect that it is probably worth $250k but the owners said they "would like to at least get what their mom inherited it for". I did some research and it was for $110k back in 1996. The current owner inherited the property when his mom passed. It is currently condemned by the county as uninhabitable. I just signed with a brokerage that says he needs to get his own representation because he could turn around and say I took advantage of him because I am a licensed agent. He didn't seem interested in representation to begin with and had offered me seller financing if I can come up with a suitable offer. I want to offer $125k because it's what I can afford with the unforseeable rehab expenses ahead of me. How do I approach this deal with the complications my license gives me? This would be my first purchase and first real estate transaction.