As for fair offer, I agree with the responses below, however, what about the overall condition of the property (i.e. repairs, updating, etc. needed). That is a big determining factor for any offer you submit.
Just to compare, I have a property for sale right now ($79,900) that we completely renovated and is move-in condition. If you would like to compare ours versus the one you are looking to make an offer on, please contact me directly to discuss. This will at least give you an idea on where you can/should offer.
Thank you -