Hi Jd1, without mentioning what type of sailboat you are looking for it is hard to recommend the most knowledgeable broker for your specific needs.
Having said that, I am from Victoria and have lived there my whole life. I have bought and sold several sailboats through Custom Yachts. Rom & Greg, the owners, are very knowledgeable and trustworthy. I have never had any reason to doubt them. They are located in Sidney, a small town about 15 miles from Victoria where all of the brokers and most of the marinas