The fact of the matter is "location, location, location". While you may choose not to live in such an area, others may given the right price. This is the benefit of the free markets.

I dont know where you are from, but there is a Sunoco Marcus Hook Refinery. So anywhere in trainer or Marcus hook ,your home could be looking straight at the refinery. But worse than the refinery itself is the flare stack. You do not want to be downwind of a flarestack...it is a long pipe (like a big cigarette) with a flame shooting out the top. This is where all the chemicals are burnt off. In trainer they built new construction right next to and downwind of the flarestack. They are starting at 170K I dont think i would live in if they gave it to my for free.

Boothwyn is fine. Marcus Hook and Trainer have nice parts and some more run down areas. All are pretty safe. The reason that they are pretty low is that the school district is not one of the better ones in the area and because they are pretty close to Chester, which is pretty run down and has its fair share of crime. That being said, the areas are very convenient to both Philadelphia and Wilmington both by car and by train. Drive through the towns and see what you think.