How Much Should I Offer?

[Patrick N.]

I'm preparing to submit my first offer on a property. It's currently listed on the MLS and would need little-to-no rehab. Basically turnkey. How do I determine what an appropriate offer would be? If it's listed for $100k, would a $75k offer be too low? Would a $95k offer be too high? Is there a general percentage rule-of-thumb to follow?

Thank you in advance!