Potential Deal, with easements

[Charles Murray]

I'm considering a deal that is walking distance to a university in a great, quite rental street. Here are the details: 

• LP: $199k (dropped about $50k in the past month and a half - could this mean they're too anxious? Currently belongs to an elderly lady.)
• 2 BR 1 BA
• Built in 1940s
• New roof in 2012
• Dry crawlspace with no visible issues
• Backs up to train tracks

Only problem is that the house is set back from the street, therefore has an easement on the driveway. It also shares a septic tank with one or two other houses. 

My question is, what should I know about these easements before making an offer?