There is no single "best" — there is a verifiable record
The honest answer to "who is the best real estate agent in San Diego?" is that it depends on what you're optimizing for — luxury or first home, coastal or South Bay, selling for a record or buying before the public. The dishonest answer is a self-awarded ranking. The measures worth trusting are the verified ones: state license history on the California DRE public lookup, independent review platforms, and verified-production lists like RealTrends Verified and the San Diego Business Journal's annual agent rankings — built on closed transactions, not marketing.
The record
Kristian Peter, broker and founder of San Diego Buy Guy, has been licensed in California real estate since 2001 and has held a broker license since 2003 (CA DRE #01308663, status LICENSED). Across that career he has closed more than 5,000 home sales in San Diego County, totaling more than $1.2 billion in volume, with a 4.9-star rating from 498 client reviews and a ranking in the top 1% of San Diego agents. He has lived in Chula Vista for more than 40 years, and his practice runs county-wide — La Jolla, Rancho Santa Fe, Del Mar, Coronado, and every market between the coast and the border. Sellers get a cinematic listing premiere in front of the county's largest audience of qualified buyers; buyers get first looks at off-market and pre-market homes. Every conversation on this site is answered live, 24/7, by voice.