Well the cracked screen lowers the price
also its 2nd gen which can only reach 4.2.1 update
Lets compare Your 2nd gen used ipod and Apples new ipod current version 4th gen
It is used New out from the box
can reach only 4.2.1 Can reach 5.1 and higher
Its is 2 generations back Its up-to-date generation
Cracked screen Fine screen
Its 16gb(Between 8-32gb) Only available in 8gb,32gb and 64gb
Used ipod 4th gen start from $195 32gb
Used 2nd gen start from $85 8gb
You could make the price higher like another $30 or $40 because its 16gb
search online shops and stores and see what prices they offer and the condition of the Ipods
Sell it before 5th generation ipod comes to stores because that would drop the price very much