My friend wants me to help sell a house

[Jonathan X Sanchez]

Me and a friend got involved in wholesaling last year. We took a break due to some life issues, but now he contacted me about his friend that is trying to sell his home, without a realtor. He wants to sell the home for $210,000, and after looking at the comps, the houses around that area in the last 3 months, sold for $190,000-$240,000. 

I will be calling him today to discuss selling the home, but I want to wholesale the property (Offering around $140,000). I'm just not sure how to navigate the conversation if he asks why can't I sell it for $210,000. He also owe's $125,000 on the house.