Garage sale culture is VERY different in North Central. Most sales start at 10am, some at 11, some as late as 4pm! Since I am always up at 6am, I went looking the first weekend I was up there, and in San Mateo, there was a Community Sale in San Mateo that started at 8. That's about 35 minutes south of San Francisco, so I was on my way. I got there, Got a map of the 40 sales within the 1 mile square. I also got a REALLY nice Sony CX 455 carousel cd player with 400 slots and a Yamaha 777 Receiver with Remotes for $20. The Sony goes for $125 to $250. The Yamaha goes for $500 used on amazon, $250 on Ebay.
I got a crock pot, some good books, a greatful dead board game (!), a bunch of smalls ($1 to $2 each, sells for $10 to $40). The weirdest thing I got was a Hunter Evapo-transpiration Sensor, new in box. not listed on Amazon, or ebay. I have no idea what it sells for, or even how to sell it, but I know it's worth a lot more than the $1 I paid for it.
Had a great time up there. I am looking forward to going back.