'OC Housewife' Jeana Keough -- Buy My Famous Mansion ... for $3.5 Million

If you dream of living like one of the "Real Housewives of Orange County" ... all you need is $3.5 mil ... and some breast implants ... because one of the original stars is selling off her famous home.

TMZ has learned ... Jeana Keough has listed her 8,000 square foot Coto De Caza mansion ... made famous by countless BBQs and mid-day booze sessions.

The OC crib is stacked -- 7 bedrooms, 6 baths, salt water pool, basketball court, outdoor fire-pit and a 6-car garage to fit your entire Mercedes Benz collection.