Dell Inspirons are consumer model laptops. Lattitude are their business laptops. The x250 has 6TH gen I5 processor so its very efficient. They also come with SSD rather than mechanical hardrives which means windows boots up in seconds. If you find any X series laptops. You would not be disappointed.
You can buy a better spec for the same price if you go for AMD instead of intel,
And don't believe people that tell you AMD aren't as good, perhaps not as good for gaming, but for anything else absolutely nothing wrong with them. I have a two year old Lenovo with an AMD A9 chip, 8G ram, 500G SSD , cost about £320 iirc.
Have a look on ebuyer .