This week green tags and tags marked "Week 20" are half price at Goodwill in Ahwatukee, located at.
I found this Gevalia coffee maker with a "Week 20" sticker for $14.99, making it $7.50. Compare that to a new one for $89.99, that's quite a deal!
Tomorrow (June 5) is also their twice-monthly half price Saturdays sale where everything in the store is half off. Doors open at 9 a.m., be prepared to fight the crowd.