I bought another 1st gen iPod off eBay because I became afraid of taking my 1G out in public for fear I'd drop it or lose it. I only bought the unit itself with no original packing material or anything like that for this one (I truly bought it to USE) so it was only about $50. It's not in bad shape, has a chip on the headphone port but it still works just fine.
Anyway I recalled the serial number discussion earlier and this one is a U2229XXXXXX (May). Which has to make this one of the last of the 1st Gen's produced as the 2nd gen ones were released in July of 2002 I believe.
It's great to see all of these new collections popping up. We're all very diseased