Die Craigslist, Die!
Also, they need to expand well beyond consumer electronics: on CL I've bought furniture, cars, found freelance work, searched for office space, searched for a home to lease, and more.
FOBO could "win" 100% of personal consumer electronics sales in SF and it's probably would have no effect on CL.
I tried it when I landed at SFO on my last trip to SF. It gave me the same message there, even after I quit and restarted the app. (Google Maps was reporting my correct location, so it wasn't my GPS being funny.)