Is this a good flip?

[Adam B.]

Asking price: $39k
Rehab: $15k
ARV: $85k +-$5k

On paper this looks like a good one, but I am a little scared because it's my first flip. I am paying cash so this should minimize some fees.

I also want to ask what should I offer? Is there a certain % you guys use to make your offers, like %80 of asking price?

Thank you for the info...