Here are some ccheapo prices on Lite-On drives @ Dell with the auto 10% off:
Lite-On 40x12x48 Internal CDRW Drive
$83.95 - 10% = $75.56
Lite-On 32x12x40 Internal CDRW Drive
$69.95 - 10% = $62.95
Lite-On 16x DVDROM/ 40x CDROM Drive
$40.95 - 10% = $36.85
Lite-On 52x Max CDROM Drive
$24.45 - 10% = $22
Lite-On 24x10x10x USB 1.1/2.0 External Slim CDRW Drive
$125.95 - 10% = $113.35
+ shipping ($3.50 ground)
Lite-On 40x12x48 Internal CDRW Drive
$83.95 - 10% = $75.56
Lite-On 32x12x40 Internal CDRW Drive
$69.95 - 10% = $62.95
Lite-On 16x DVDROM/ 40x CDROM Drive
$40.95 - 10% = $36.85
Lite-On 52x Max CDROM Drive
$24.45 - 10% = $22
Lite-On 24x10x10x USB 1.1/2.0 External Slim CDRW Drive
$125.95 - 10% = $113.35
+ shipping ($3.50 ground)