Anyone can list a guitar on Reverb, but most private sellers want cash today and most buyers want a seller with a long track record. One Mesa, Arizona dealer built both, and says he moves more than $2 million of instruments a year.

When eggs hit a record $6.23 a dozen, a Marin County chicken shop said business jumped 50%. The hens are the cheap part. The money is in redwood coops from $775 and custom predator-proof runs that can reach $15,000.

Giant Jenga, cornhole and Connect 4 rent for $45 to $50 a party and can pay for themselves in four or five bookings. A Raleigh marketing manager started with three games in his garage in 2018 and grew to more than 30 locations.