Pawn shops often have a variety of used musical instruments, including drum sets. Prices may be lower than retail stores, and you may be able to haggle for a better price.
Garage sales and thrift stores:
These places can be great for finding used drum sets at a fraction of the cost of new ones. Be sure to inspect the drums carefully before buying, as they may need repairs or new parts.
Online classifieds:
Websites like Craigslist and Facebook Marketplace often have listings for used drum sets. You may be able to find a great deal if you are willing to pick up the drums in person.
Local music stores:
Some local music stores may sell used drum sets. They may also be able to provide advice on where to find used drum sets in your area.