First flip "maybe"

[Jon Mccarthy]

I found a house I want to buy and flip it is going for 79,900 I want to offer 70 for it. I think if i can dump about 30 into it I could get about 130 to 140 for it. Here is the problem the seller does not want to sell for anything less and wants all cash now this place has been on the market for awhile. Now to me that is a big red flag. That tells me there is more wrong with it than meets the eye. But again I am a beginner and can be looking at this with too much caution. What do you all think I want as much input as possible. Thanks Jon