Fill out an application, either at our office or online (under quick links above). Just fill out our online application form to get things started.Who must obtain a seller's permit? What does engaged in business mean? Find a Business Broker in San Bernardino County, California to help you buy or sell a business. Purchasing is open Monday through Friday, 8 a.m. Register Your New Business Online. The City of San Bernardino Business Registration Division now accepts new applications via web registration. The documents you need to buy or sell a business depend on the structure (discussed here) and complexity of the deal as well as its specific terms. The most San Bernardino County, California businesses for sale listings including franchises, opportunities and businesses.