Accepted offer on side by side duplex with foundation Cracks

[Luke C.]

So I received an accepted offer on a duplex and had the inspection done today. The inspection showed two horizontal cracks about 1/8 inch wide and bowing in about 1 inch. The inspector was very detailed and found a few other items and radon levels just above the recommended EPA guide lines. I'm worried because I know the foundation repair can be expensive and lower the property value. Also having a radon system installed would be a must. I am considering backing away from the deal which is tough since I have been looking for two years now. My next step is to have the crack checked by an masonry contractor and look into having the sellers pay for the correction. Just feel like I may be getting in over my head. 

The home was build in 1978 and one side is in pretty good shape and the other needs a good amount of TLC. The roof is newer, Furnaces and water heaters are newer. Thoughts?