If you have a really fabulous San Francisco property, like a luxury condo near the museums and restaurants or a perfect home in Russian Hill with views to die for, you might be able to turn your real estate into a fractional property. Fractional real estate sells for 1-2.5 times a regular sale and it gives you the option of keeping a part of your property.
Say you are ready to retire to the Wine Country but want to have a place in San Francisco during Opera Season (or heck, Giants season for that matter)...how about selling a part and keeping a part? Continue to reap the benefits of San Francisco's phenomenal property appreciation, while cashing out so you can buy your dream home in the country.
Just a thought...