Just a data point:
About 6 years ago I sold an original iPod. It had been opened, but all the packaging and inserts, cables, etc had been carefully preserved (even the shrinkwrap remained, just cut on the top to open it) thanks to an OCD owner (me) who saved the boxes on nearly everything. The iPod was in very good cosmetic condition, but the battery wouldn't hold a charge.
It wound up selling for just under $300 I think - someone very much wanted it for display purposes. At the same time I also sold a similarly used RIO PMP 300, complete with box and everything inside - the first available MP3 Player in the USA - and it went for about $70.