I know that you can purchase memory upgrades for laptops, but can you even purchase hard drives?

Yea you can, they are a little smaller and they are more expensive than the regular.

We found some for a good price.

www.pricewatch.com - go to www.resellerratings.com before buying

Try out General Nanosystems. They always have good prices. Plus they're local. Right off university in St. Paul. I just bought a USB 2.0 PCI card from them for $14.99. Best Buy, Circuit City Etc. had them starting at $35. So I saved $20, not bad. I looked, and they have laptop hard drives starting at $129.99 for a 20Gb. By Comparison, Comp USA has the same 20gb hard drives starting at $167.55.

I'm just gonna get one through Dell. Already have the credit to not have to pay for anything upfront.

I have a spare 10 gig laptop HD I could get to ya.