Some good places to buy secondhand pianos include Pianomart.com and local shops like The Piano Warehouse. To buy pianos online, classifieds like Pianomart.com provide the most options.
There are online classified ads specifically for buying new or used pianos, such as Pianomart.com. This provides multiple ways to search for pianos, including selecting the type of piano, the manufacturer, the location or the dealer. There is also a list of all recently added baby, grand and vertical pianos available for sale.
Local stores like The Piano Warehouse are another good option. There are no shipping charges and people can see the secondhand pianos up close. This location is in California, but other cities and states may have a similar store.