What is the age of the apartment complex??
The original year built and not the (EYB) effective year built when improvements were made.
Given your complex is in California it sounds like you are banking more on appreciation than cash flow.
There is just so much information missing on this deal.How much money do you have tied up with your interest??
I don't think you can value your percentage of market rate compared to what a buyer could purchase and have total control of a property.
Example you have 100k invested as your portion in this property.As a buyer I would much rather buy into a controlling majority interest or own a property 100% and control my investment.
Would another family member not just buy out your interest?? Even if you sold at a small loss to them you would get more money than selling your interest to a stranger who doesn't have an interest in the property.The stranger will have to price the risk as high and buy real low to offset the risk and not having control.
Rather than creating a sh&t storm with your family I would just make up a compelling reason you need to exit the property and sell them your shares.You could also split up the interest and sell different percentages to different family members.You could also try to buy more shares into the property to get controlling interest.It sounds like however that everyone might be going different directions.Even if you sold at a discount it might be cheaper than going through a bunch of legal and wasted time to arrive at the same point.