"I'll part it out" says the person not willing to spend the hour getting their bike running.
Shit happens all the time, the light bulb goes off that on eBay the prices mean they could get double what they want for the bike as it sits if they just take it apart and put them up for sale, but a lot of people forget that there is a low demand for parts relative to how cheaply you can just get a non-running moped. Why pay $40 for a stock Garelli exhaust header on eBay when I can go buy a complete non-running Garelli for $150?
So this person starts tearing their bike apart, sells the 2 most desirable parts on their bike for $100, awesome. But then nothing else is selling, 6 months go by and the bike is still sitting there, albeit in pieces. So then you wind up taking a $300-400 bike and removing parts on it to make $100, and you either sell it for $100 or you just give up and throw most of the parts out. When you could have just sold the damn bike for $250-300 and not spent hours of your valuable time taking everything apart, putting up pictures, etc.
I've seen it happen again and again, the solution isn't parting the bike out; it's to lower your price.
Sorry for the rant but I hate when people part out complete bikes because they're too lazy to learn how to get it running. That almost always results in a good bike being destroyed and the owner losing money without much benefit to anyone except the 2 people who buy parts off of it.