Located property on my own-realtor wants commission

[Michael R.]

I have a deal worked out with a seller of a property that I located via my direct mail campaign. Then this realtor calls me claiming the property was listed with him and I have to go though him to purchase it. Now I never met him and he never showed me the property. He says I will have to cover sellers closing costs which include his 2k commission. The seller says that she wants to sell to me as it has been listed with him for over 6 months with no offers. Seller says just go ahead with the sale.

What would you guys do? I will speak to my attorney today as well just looking for some other advice. I am guessing if she does sell to me he will take her to court for the commission. I do not see how I would be liable for the commission when I do not have the contract with him, Thanks