With over 80 years of hands-on experience: McColms & Co was established as a Stock & Station Agency in 1939 by John & Ethel McColm & has been continually operating in Bundaberg. We pride ourselves on providing the full range of services from a team who has over 80 yearsâ experience in selling real estate in our local area. Many of our clients come from repeat business which is by itself a valuable testimonial as to how they felt about their dealings with our office. Supported by the First National co-operative: We're not a franchise. This means each member office has input into how First National is operated. First National McColms is owned and operated by its Principal & Licensee, Justin Mayberry.