How cheap is cheap?
Don't have a laptop but personally if I was going to get one I would consider a Toshiba. Two of my friends have them, one runs her business on it and has had it for nearly 4 years, in use every day and has never missed a beat. Other has had theirs over 2 years and again no problems.
Heres some as an example click here if you do buy from Morgans pay particular attention as to whether the laptop is new or refurbished. Personally I would only buy a new one, but thats me.