Since it seems like alot of you peoples have experience with a lot of laptops both Mac and PC I was wondering if you guys could give me some tips on buying a notebook for my mother's business. All she needs is a cheap notebook to get store sales off cash registers and into a spreadsheet program on a computer. I am looking into getting A) a used notebook or B) a refurb. Any tips on what to look for when buying used or refurb. Looking to spend under $800 canadian pesos. Thanks in advance.