The battery on my iPod died recently.  It happened all of a sudden.  It was working and then, it wouldn't hold its charge.  So I researched my options.  It's out of warranty but Apple has a service to have iPods shipped for battery replacement.  It costs $69.95 + shipping and takes a week to turn around.  There are authorized repair centers as well but some of them won't give a quote over the phone and you of course have to take the ipod in.  Then I came across the NYC iPod doctor, otherwise knows as Demetrios.  Since I was headed into NYC for a few days, I contacted him and we worked out a time to meet.  He met me at a time and place of my convenience and was cheaper as well (~ $45 if I recall correctly). 

In Demetri's words, "'I've been a traveling iPod Doctor for about four years know.  I got
started when I sent an iPod off to Apple to get it repaired and was quoted a $250 repair bill.  So I decided to start buying broken iPod and reselling them but more and more people who were selling me their
iPods REALLY just wanted to get them fixed so i stopped selling them and started repairing them for people." It is now a full-time job and he doesn't seem to have much competition in Manhattan. 

The iPod Doctor is a great example of a new type of job that emerges from what Schumpeter termed "creative destruction".  The prospects of a record store clerk or owners don't look so good.  But on-demand servicing of iPods and related devices?  I'd say the prospects are much better.