how to know how to offer the correct price on wholesale deals

[David Stanfield]

I have a question when trying to decide how much to offer sellers who want to sell their homes how do i come up with a price to offer where I can make a profit with the end buyer.  I understand for the most part how the process goes.  I know you pull comps if a home comps are 100000 you discount 30% or 70000 minus repairs say 15,000 then 55,000 is the most you offer.  However I have found here in st louis that formula doesn't always work.  I was trying to figure out what to offer a seller her house comps were 50,000 some higher some lower if I use the same formula 20000 should have been tops but when i went to the end buyers most didn't wanna pay more than 10,000 i'm confused I know it something simple and advice.