Given how many utter flakes I've experienced when selling (or even giving away!) stuff on Craigslist, I think liquidity here actually has tremendous value. And

Given how many utter flakes I've experienced when selling (or even giving away!) stuff on Craigslist, I think liquidity here actually has tremendous value. And unlike modern stock trading, not all Craigslist listings are created equally. He seems to be doing the dirty work that sellers don't want to bother with. Besides, everyone knows that if you want get paid a reasonable value, you put something on eBay, but that's too much hassle for these sellers.