Over the summer, I spent quite some time looking for a good cheap lunch I could get while at work at the Marin JCC. The Santa Venetia market sells several different types for about $2 each, and they're not at all bad. Not AMAZING, but they were consistently good all summer, and it beats a lot of the stuff I've had at other places. Try the pork and chicken tamales, and you gotta get them in the morning (They get put out at about 8:30-9:00 AM), when they're hot and fresh. They are a bit too heavy on the masa, but I was a fan of the fillings, except for the mushroom ones.