Ithaca is home to one of the world's most successful local currency experiments. The Ithaca Hour (http://www.ithacahours.org) is Ithaca's local currency and is accepted by more than 600 local merchants and service providers. Using Ithaca Hours contributes to Ithaca's economy and small businesses. The Autumn Leaves bookstore at Ithaca Commons serves as the unofficial home of Ithaca's local currency and is the best place to go to acquire Hours. Of course, U.S. dollars are also used in Ithaca.
Shopping in Ithaca is in four major areas: Downtown/Commons, Meadow Street/Route 13, Collegetown, and Lansing/Mall area.
Meadow Street/Route 13
Also known as the strip. the "big-box" stores have been moving in in a major way in recent years along meadow st. drugstores, cellphone stores, supermarkets, and major discount retailers are often present in multiple incarnations. there is not much exciting here for the out-of-towner although it is certainly practical. an exception is northside liquors see the drink section.
Lansing/Mall
Finally, just north of ithaca in lansing is the shops at ithaca mall formerly known as the pyramid mall, recently expanded to hold borders now closing, best buy, dick's sporting goods, and target, offering a fairly broad and ubiquitous selection of shops. nearby are the triphammer and cayuga malls, which are less elaborate.
Books
If you'll be in Ithaca in May or October, look into the dates of the huge Friends of the Library (http://www.booksale.org/) book sale, which lasts a week or two for each sale period and offers over 250,000 items for sale, with proceeds supporting the fancy, new but cash-strapped county library on the corner of Green and Cayuga Streets.