If they had kept making old versions of the iPod, how much would they cost now? The original iPod held 5GB and cost $399, making its cost $79.8/GB. The latest (mid-range) iPod Touch holds 32GB and costs $334 or $10.43/GB. So an original iPod at that cost per GB would now only set you back just $52. Conversely, an iPod Touch at the old per-gigabyte price would cost $2553.
Mokalus of Borg
PS - I got the current iPod Touch price from JB HiFi.
PPS - And I may be comparing AUD to USD, but you get the idea.