Firstly, we'd have an older machine like this one. Most likely an off lease laptop, it comes with a 320 gig HD, an i5 540m (older but still good) and 4 gigs of ram plus windows 7.
Next, this is about 450 bucks, but an ultrabook (basically for the best portability). It has a 3rd gen i5, 4 gigs of ram, a 500 gig hd and a 24 gig ssd, and windows 8.
Edit- I would have more but my internet is being extremely slow and refuses to load the sites I need >.>
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/www.ebay.com/itm/Dell-Lattitude-E6410-Laptop-Core-i5-540M-2-53Ghz-320GB-4GB-DVDRW-Win-7-Pro-64Bit-/141187148782?pt=Laptops_Nov05&hash=item20df68ebee