The Dell Inspiron 15R is a cheap but good quality laptop mainly targeted at students. You can purchase it at amazon for only $700: Dell Inspiron 15R i15RM-7537sLV 15.6-Inch Laptop (Moon Silver)
It comes with a respectable i5 processor, 6GB RAM, a 15" screen, and a 750 GB hard drive. It performs well and is great for tasks. All in all it is a great inexpensive laptop you should buy!