These sellers of ham radio equipment come recommended by SPARC members. If you want a broader sense of what is available, find a copy of QST Magazine which is always packed with advertisements.

Ham Radio Outlet
They have a well-stocked Burbank location.

DX Engineering
A major patron of our hobby with an extensive catalog.

Main Trading Company
Known for selling surplus and used equipment.

Ed’s Antennas
UC Santa Cruz professor Ed Fong makes and sells well-regarded, affordable VHF/UHF antennas.

A U.S.-based seller of Chinese-made Baofeng equipment. A good option if you like the low price of Chinese radios but want the benefit of customer support.
A ham community site that lists equipment being sold by individuals.

Orange County-based manufacturer of lithium iron phosphate batteries, prized for their portability and long duty cycles.