Without local shops, shoppers would buy gifts exclusively from in-flight catalogs, forcing fathers to sneak into airplane-wheel wells on Black Friday to order spy-camera blenders for their children. Enjoy earthbound browsing with today's Groupon: for $10, you get $20 worth of items at the American Cancer Society's Discovery shops. This Groupon is valid at all 40 of Discovery's California locations.

Since 1965, the American Cancer Society's Discovery shops have supported the organization's mission of "research, advocacy, education, and services" with a generous, ever-updated collection of gently used clothes, furniture, household goods, jewelry, and antiques. Discovery shopkeepers and volunteers maintain tightly organized stock to help visitors find what they need. All the donated items arrive in good condition, freeing shoppers from the threat of torn shirts or melted antique ice-cream cones (tees and men's shirts $3+; blouses $5+). Bounce onto a sofa to practice settling in with a new book ($0.50+) or pick out a lamp (around $15) to illuminate a new dwelling. The empty walled come up full-handed after perusing the stores' collections of artwork, and unembellished fingers adorn themselves in shimmering baubles and glisteningly good karma with strolls through jewelry collections ($1+).