Considering your HD just
crashed are you sure you should be seeking something "cheap" ?
If it's a recent model laptop then there shouldn't be any probs with replacing the HD, but you may run into some hurdles with reinstalling everything. Did your lappy come with a restore disk? I swapped out a 40Gb HD (with everything preinstalled) for a 100Gb new drive and the restore disk fixed everything up.
You may also want to buy a 2.5" to 3.5" adapter to see if you can read the drive's contents in a desktop PC.