I bought my last computer from a Dell outlet online, and I really like it. I think they sell mostly used and refurbished computers. This is a desktop I'm talking about, but they sell laptops too. The prices are low. There is wide variety, and they can come with a variety of extra features. If you want anything extra you can order that too.
The main downside is that you need a pretty good idea of what the computer specs mean if you buy something from there. If you don't know anything about computers, then you'll need a face-to-face salesperson to explain things to you.