Marsi Sampson operates under California DRE #01961445 through Santee's Mission Realty Group at 278 Town Center Parkway, serving East County San Diego as the co-founder of the Property Twins real estate team. The Property Twins partnership pairs Sampson with co-agent Heidi DelaCruz (DRE #02032871) to cover simultaneous buyer and seller representation, a team model that doubles showing capacity across the Santee Town Center district near Pepper Farm Deli. Born and raised in San Diego's East County, Sampson's hyperlocal knowledge spans the residential pockets from Mast Park's eastern corridor through the Mission Gorge Road commercial spine to the Carlton Hills and Fanita Parkway neighborhoods. Listing presentations build on neighborhood-specific comps pulled from the 92071 ZIP code, with property photography and virtual-tour production designed to reduce days on market. That East County depth serves clients navigating the homes-for-sale market in neighborhoods where proximity to Mission Trails Regional Park and Cowles Mountain drives buyer demand, a dynamic visible in the recreation-adjacent retail corridor near Fix Auto Santee on Prospect Avenue. Complex transactions include dual-agent coordination on simultaneous buy-sell scenarios, multi-offer escalation strategies, and relocation packages requiring compressed escrow timelines under 30 days.