I offer $2.50 and the flat cat I saw on the side of the road yesterday.
Seriously. The OP can probably order a Haswell-based laptop with Win 7 on it since Win 8 is a dismal failure. Much easier to pick up a new WD 750 GB Scorpio Black and clone/expand the original 500 GB onto the new disk. The 750 GB are about $80 and the software can be had for free. I use the utilities on Ultimate Boot CD or Hiren's Boot CD. Both have the HD tools provided by the major drive manufacturers as well as tons of other diagnostic/repair tools.
Sounds like a good idea to me.